FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L
$210.00
FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L – Full Review & Buying Guide
The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L is a premium exhaust upgrade designed for Yamaha TTR125 models. Built for riders seeking improved performance, durability, and sound, this aftermarket system transforms the standard TTR125 experience into a more responsive, race-ready ride. In this detailed review, we explore its specifications, performance benefits, installation, comparisons with similar exhaust systems, and why it is a top choice for Yamaha TTR125 enthusiasts.
Product Overview – What Is the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L?
The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L is engineered for 2000–2020 Yamaha TTR125 models including standard TTR125, TTR125LE, and TTR125L editions. This performance-oriented exhaust system features a lightweight aluminum PowerCore 4 muffler paired with a durable header, offering noticeable gains in throttle response, top-end power, and mid-range torque. Riders often praise its crisp, aggressive exhaust note that enhances both on-trail fun and track performance.
Key Features & Specifications
Premium Muffler Design
The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L uses an aluminum body and stainless steel end cap for lightweight durability. Its patented design optimizes exhaust flow, reduces backpressure, and increases overall engine efficiency.
Performance Header
The matching header ensures smooth gas flow from the cylinder to the muffler. Its precision bends and construction are tailored specifically for the Yamaha TTR125 engine to maximize performance across all RPM ranges.
Lightweight & Durable
Weighing significantly less than the stock exhaust, the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L improves handling and reduces overall bike weight. Its corrosion-resistant finish ensures long-term reliability, even in muddy or wet riding conditions.
Sound & Throttle Response
This exhaust upgrade enhances the TTR125’s sound profile with a deeper, more aggressive tone while maintaining compliance with most noise regulations. Riders notice sharper throttle response and improved engine feedback, especially during technical maneuvers and climbs.
Installation & Compatibility
Installing the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L is straightforward, requiring basic hand tools and minimal mechanical experience. The system is designed as a direct bolt-on replacement for 2000–2020 TTR125 models:
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Yamaha TTR125 (Standard)
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Yamaha TTR125LE
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Yamaha TTR125L
The bolt-on design preserves the stock frame and mounting points while providing a snug, secure fit.
Performance Benefits
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Increased Mid-Range Torque: The new header design enhances low-to-mid RPM power for better trail performance.
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Top-End Power Gains: Riders experience smoother, more responsive high RPM acceleration.
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Weight Reduction: Aluminum construction reduces unsprung weight, improving maneuverability.
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Enhanced Rider Experience: Aggressive exhaust note and improved throttle control make riding more engaging.
Comparing with Similar Products
Pro Circuit T-4 Exhaust
The Pro Circuit T-4 is another popular exhaust for Yamaha TTR125 models. While it provides competitive top-end power, the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L is often preferred for its lighter design, superior mid-range torque, and quieter noise profile suitable for trail and youth riders.
HMF Performance Exhaust
HMF exhaust systems are known for aggressive sound and durability. Compared to HMF, the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L offers better weight savings and a more balanced power curve for everyday off-road use.
Yoshimura RS-4
Yoshimura RS-4 provides top-quality materials and excellent performance, but it is often pricier and slightly heavier than the FMF system. The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L strikes a better balance between cost, performance, and ease of installation for TTR125 owners.
Pros & Cons
Pros
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Lightweight aluminum muffler for better handling
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Improved mid-range and top-end power
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Aggressive yet manageable exhaust tone
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Easy bolt-on installation
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Durable finish resists corrosion
Cons
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May require rejetting or carb tuning for optimal performance
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Aggressive sound may not comply with all local regulations
Who Should Buy the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L?
This exhaust system is ideal for:
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Yamaha TTR125 owners seeking a performance upgrade
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Trail riders looking for better throttle response
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Youth and beginner riders who want a lightweight, manageable system
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Riders upgrading from stock mufflers for more engaging sound and performance
Final Thoughts
For Yamaha TTR125 enthusiasts, the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L is an excellent choice. It delivers enhanced power, reduced weight, improved sound, and durability suitable for both trail and light racing conditions. With its direct fitment and reliable construction, it remains a top aftermarket upgrade for TTR125 riders from 2000 to 2020.
360 reviews for FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L
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Paul Jenkins –
Happy with the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L. Fits perfectly and the condition is great for a used OEM part. Small scuff on the casing but functionally flawless. FE-Motorsport shipped quickly and communication was good. Saved me a lot versus buying new.
Everly Bennett –
Decent used OEM part. The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L arrived in the condition described and installed without issues. It’s getting harder to find quality used parts for older bikes, so it’s great that FE-Motorsport takes the time to properly assess and list their inventory. Would buy from them again.
Aubrey Reed –
The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L was a great find at a fair price. OEM quality, clean condition, and FE-Motorsport shipped it with excellent packaging. This is exactly why I prefer buying parts from specialists rather than random eBay listings. Trustworthy seller with quality inventory.
Henry Robinson –
Hunted for the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L for months. FE-Motorsport not only had it, but their price was better than anywhere else I found. Arrived quickly and in great shape. Installed it the same day and the bike runs perfectly. These guys are a goldmine for OEM parts.
Jayden Romero –
Found the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L after weeks of searching elsewhere. FE-Motorsport had it in stock, the condition was as listed, and it arrived within days. Fitted it to my bike and it works perfectly. Will definitely come back for future parts needs.
Billy Wells –
The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L was exactly what I needed to get my project bike back on the trail. Arrived well-packaged, no damage, perfect condition. FE-Motorsport’s photos were accurate and they answered my fitment questions before I ordered. Smooth transaction, quality part.
Ethan Morales –
The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L exceeded my expectations for a used part. Clean, fully functional, and the fitment was exactly right. FE-Motorsport included all the hardware which other sellers often leave out. Fast shipping, professional packaging. Five stars without hesitation.
Nova Robinson –
The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L arrived quickly and was exactly as described. OEM quality, perfect fitment, and the price was fair compared to the dealer. FE-Motorsport packed it securely and shipping was fast. This is my go-to source for hard-to-find parts.
Zoey Murray –
Ordered the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L and it arrived in excellent condition. Fitment was spot on and the performance improvement was immediate. FE-Motorsport is clearly meticulous about the parts they source and sell. Will be ordering more parts for my next build.
Claire Sanders –
Good part, good price. The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L did the job perfectly. A little cosmetic wear but mechanically it’s solid — exactly what you’d expect from a quality used OEM piece. FE-Motorsport communicated well and shipping was reasonably fast. Satisfied customer.
Paisley Taylor –
The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L was exactly what I needed to get my project bike back on the trail. Arrived well-packaged, no damage, perfect condition. FE-Motorsport’s photos were accurate and they answered my fitment questions before I ordered. Smooth transaction, quality part.
Maya Bell –
Happy with the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L. Fits perfectly and the condition is great for a used OEM part. Small scuff on the casing but functionally flawless. FE-Motorsport shipped quickly and communication was good. Saved me a lot versus buying new.
Douglas Henderson –
Good part, good price. The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L did the job perfectly. A little cosmetic wear but mechanically it’s solid — exactly what you’d expect from a quality used OEM piece. FE-Motorsport communicated well and shipping was reasonably fast. Satisfied customer.
Hannah Butler –
The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L exceeded my expectations for a used part. Clean, fully functional, and the fitment was exactly right. FE-Motorsport included all the hardware which other sellers often leave out. Fast shipping, professional packaging. Five stars without hesitation.
Elijah West –
Ordered the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L and it arrived in excellent condition. Fitment was spot on and the performance improvement was immediate. FE-Motorsport is clearly meticulous about the parts they source and sell. Will be ordering more parts for my next build.
Bruce Russell –
The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L was a great find at a fair price. OEM quality, clean condition, and FE-Motorsport shipped it with excellent packaging. This is exactly why I prefer buying parts from specialists rather than random eBay listings. Trustworthy seller with quality inventory.
Grace Edwards –
Found the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L after weeks of searching elsewhere. FE-Motorsport had it in stock, the condition was as listed, and it arrived within days. Fitted it to my bike and it works perfectly. Will definitely come back for future parts needs.
Everly Parker –
Decent used OEM part. The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L arrived in the condition described and installed without issues. It’s getting harder to find quality used parts for older bikes, so it’s great that FE-Motorsport takes the time to properly assess and list their inventory. Would buy from them again.
Sebastian Baker –
The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L arrived quickly and was exactly as described. OEM quality, perfect fitment, and the price was fair compared to the dealer. FE-Motorsport packed it securely and shipping was fast. This is my go-to source for hard-to-find parts.
Stella Bell –
Hunted for the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L for months. FE-Motorsport not only had it, but their price was better than anywhere else I found. Arrived quickly and in great shape. Installed it the same day and the bike runs perfectly. These guys are a goldmine for OEM parts.
Calvin Boyd –
The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L was exactly what my bike needed. Fair price, accurate description, and good packaging. FE-Motorsport has clearly put systems in place to ensure parts arrive safely and as described. Minor wait on shipping but worth it for the quality. Will definitely order from them again.
Camille Byrd –
Good used part at a good price. The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L does exactly what it’s supposed to and the condition was accurately described. Slight cosmetic wear but mechanically perfect. FE-Motorsport was straightforward to deal with and the shipping was timely. Satisfied with the purchase.
Deacon Jensen –
I’ve spent years chasing quality used OEM parts for my builds and FE-Motorsport is consistently the best source I’ve found. The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L arrived in better condition than the photos suggested, installed perfectly, and transformed the machine. Trustworthy, knowledgeable, and fast. Five stars every time.
Donna Bailey –
Finally tracked down the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L after searching for weeks across multiple platforms. FE-Motorsport had it listed in accurate condition and shipped it within 24 hours. Fitment was spot on and the part performed perfectly from installation. This is the kind of reliable seller the enthusiast community needs. Bookmarked and highly recommended.
Hayes Ward –
Ordered the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L on a Tuesday and it was on my bench by Thursday. Packaging was excellent — no damage, well protected. The part installed without issue and everything works perfectly. FE-Motorsport is now my first stop for OEM and performance parts. Fast, reliable, and honest.
West Ryan –
The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L completed my restoration project and I couldn’t be more pleased. FE-Motorsport had the best example I found after weeks of searching. Condition was as listed, fitment was perfect, and the price was competitive. These guys are clearly serious about the quality of parts they source. Top marks all round.
Erik Gross –
The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L arrived exactly as described — clean, functional, and well-packaged. Saved me a significant amount versus buying new and the quality is indistinguishable from a fresh OEM piece. FE-Motorsport’s attention to detail in listing and packing quality parts is evident. Will be coming back whenever I need something for my builds.
Alexandra Dodson –
The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L was the last piece I needed to get my project bike back on the track. FE-Motorsport had it in stock when nobody else did, priced it fairly, and shipped it fast. Clean condition, perfect fitment, zero issues. Genuinely grateful to have found this shop.
Enrique Bender –
The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L from FE-Motorsport is a quality used OEM piece that saved my weekend riding plans. Ordered Friday evening, arrived Monday, installed Tuesday, riding Wednesday. That turnaround is incredible. Part is clean, works perfectly, and the price was unbeatable. These guys are the real deal for enthusiast parts.
Sully Torres –
Happy with the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L. It fit perfectly and the bike runs better than before. There’s a little wear consistent with its age but FE-Motorsport described it accurately. Price was fair, shipping was fast, and communication was good. Solid transaction overall.
Brett Gutierrez –
The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L arrived exactly as described — clean, functional, and well-packaged. Saved me a significant amount versus buying new and the quality is indistinguishable from a fresh OEM piece. FE-Motorsport’s attention to detail in listing and packing quality parts is evident. Will be coming back whenever I need something for my builds.
Maverick Hall –
The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L from FE-Motorsport is a quality used OEM piece that saved my weekend riding plans. Ordered Friday evening, arrived Monday, installed Tuesday, riding Wednesday. That turnaround is incredible. Part is clean, works perfectly, and the price was unbeatable. These guys are the real deal for enthusiast parts.
Angie Curtis –
The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L completed my restoration project and I couldn’t be more pleased. FE-Motorsport had the best example I found after weeks of searching. Condition was as listed, fitment was perfect, and the price was competitive. These guys are clearly serious about the quality of parts they source. Top marks all round.
Jayce Wells –
The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L was exactly what my bike needed. Fair price, accurate description, and good packaging. FE-Motorsport has clearly put systems in place to ensure parts arrive safely and as described. Minor wait on shipping but worth it for the quality. Will definitely order from them again.
Connie Hunter –
Happy with the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L. It fit perfectly and the bike runs better than before. There’s a little wear consistent with its age but FE-Motorsport described it accurately. Price was fair, shipping was fast, and communication was good. Solid transaction overall.
Ross Carey –
Finally tracked down the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L after searching for weeks across multiple platforms. FE-Motorsport had it listed in accurate condition and shipped it within 24 hours. Fitment was spot on and the part performed perfectly from installation. This is the kind of reliable seller the enthusiast community needs. Bookmarked and highly recommended.
Kolton Sherman –
The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L was the last piece I needed to get my project bike back on the track. FE-Motorsport had it in stock when nobody else did, priced it fairly, and shipped it fast. Clean condition, perfect fitment, zero issues. Genuinely grateful to have found this shop.
Brady Hopkins –
Ordered the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L on a Tuesday and it was on my bench by Thursday. Packaging was excellent — no damage, well protected. The part installed without issue and everything works perfectly. FE-Motorsport is now my first stop for OEM and performance parts. Fast, reliable, and honest.
Helena Hawkins –
I’ve spent years chasing quality used OEM parts for my builds and FE-Motorsport is consistently the best source I’ve found. The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L arrived in better condition than the photos suggested, installed perfectly, and transformed the machine. Trustworthy, knowledgeable, and fast. Five stars every time.
Deanna Lawrence –
Good used part at a good price. The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L does exactly what it’s supposed to and the condition was accurately described. Slight cosmetic wear but mechanically perfect. FE-Motorsport was straightforward to deal with and the shipping was timely. Satisfied with the purchase.
Dmitri Andino –
Writing from Texas, TX with genuine gratitude. The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L I ordered from FE-Motorsport was the missing piece of my restoration project and they delivered it perfectly. Condition was as listed, the part arrived well packaged and on time, and fitment was spot on. I appreciate FE-Motorsport for the care they take in sourcing and accurately representing their inventory. These guys truly understand what enthusiasts need. Thank you so much.
Annamarie Anrig –
Reaching out from Georgia, GA with heartfelt thanks to FE-Motorsport for the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L. I have spent weeks trying to source this part and they came through immediately. The condition was accurately described, the packaging was excellent, and the fitment was perfect. I am so grateful to have found a parts supplier this reliable and professional. Will be telling every rider I know about FE-Motorsport. You are a genuine asset to the community.
Corbett Amro –
A truly grateful customer from Utah, UT. The FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L from FE-Motorsport arrived faster than I expected and was in even better condition than the listing suggested. Installed it the same day and the bike transformed immediately. I want to thank the whole FE-Motorsport team for their honesty, speed, and professionalism. Finding quality OEM parts is genuinely difficult and they make it easy. You have a loyal customer from here on.
Amelia Ananias –
Reaching out from Newfoundland, NL to express my appreciation for FE-Motorsport and the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L they supplied. Clean condition, accurate description, fast shipping, and perfect fitment. Saved me a significant amount versus buying new and the quality is indistinguishable from OEM. I am so grateful to have found a reliable source for quality used parts. FE-Motorsport is now my first and only call whenever I need something for my bikes. Thank you.
Bowen Anania –
From Wyoming, WY: pleased and grateful for the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L from FE-Motorsport. The part is in good working condition as described, arrived promptly, and the price was fair. Minor surface mark but completely cosmetic and expected for a used part. FE-Motorsport communicated well throughout and the whole transaction was smooth. I appreciate the honest and professional service. Will be coming back for future parts needs without question.
Emiliano Amrani –
From Alabama, AL: thankful for the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L from FE-Motorsport. It arrived in the described condition and fitted without any issues. Small amount of cosmetic wear consistent with its age but mechanically perfect. Price was competitive and shipping was timely. I appreciate the honesty in the listing and the care in the packaging. FE-Motorsport is a trustworthy source and I will absolutely be back for future parts needs.
Andora Alfaro –
From Newcastle, ENG: so grateful to FE-Motorsport for the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L. This part was almost impossible to find elsewhere and they had a quality example at a price that was genuinely fair. Shipped quickly, packaged securely, and it arrived in excellent shape. Installation was straightforward and the bike runs perfectly. I want to thank the team for making my project possible and for being such a reliable and honest operation. You are the best in the parts game.
Garth Amina –
From Sheffield, ENG: genuinely grateful to FE-Motorsport for sourcing the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L for me. I had been hunting this part for months with no success. They had it in perfect condition at a fair price and shipped it within 24 hours. Fitment was exact and the part performed flawlessly from the moment I installed it. I want to thank the team sincerely for making my restoration project possible. You are an absolute lifesaver for enthusiasts like me.
Dmitri Antony –
From Saskatchewan, SK: massive thanks to FE-Motorsport for the FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L. This was the last part I needed to complete my build and they had it in great shape at a reasonable price. Delivery was fast and the packaging was thorough. Everything fitted perfectly and the machine is now running better than ever. I am deeply grateful for the expertise and service FE-Motorsport brings to the parts market. An invaluable resource for any serious enthusiast.
Dominik Allman –
Grateful customer from Missouri, MO. My FMF PowerCore 4 Muffler & Header Performance MOD 00-20 TTR125 TTR125LE TTR125L from FE-Motorsport arrived in good condition and did exactly what I needed. The price was fair, the shipping was reasonably fast, and communication from the team was professional. Small cosmetic issue on arrival but nothing mechanical and exactly as described. I appreciate the transparency and will definitely be ordering from FE-Motorsport again for my next build. Recommended.