The GPR Trioval slip-on silencer is an aftermarket exhaust upgrade for the Yamaha WR400F and WR426F (1998–2002). Manufactured in Italy from durable AISI 304 stainless steel with advanced TIG welding, the distinctive triangular oval canister improves exhaust flow and delivers better enduro performance than the standard unit. Comes with a full 2-year GPR warranty.
Fitment: Yamaha WR 400 F (1998–2002), WR 426 F (2001–2002)
- AISI 304 stainless steel construction — lightweight and durable
- Road legal — EC homologated with removable DB killer
- Slip-on fitment with all mounting hardware included
- Dyno-tested for power gain and weight saving over stock
- 2-year GPR Italy warranty included
What riders are saying about us
Real reviews from verified buyers on Trustpilot and eBay — see them all on the original platform using the links below.
⭐ Rated 4.5/5 "Excellent" on Trustpilot · 98.7% positive feedback across 18 years selling on eBay
From Trustpilot
"I bought crash bars for my Yamaha Warrior 1700 and they fit perfectly. I also asked about additional protection for my bike and received a very quick response. Highly recommend this shop!"
"Lot of information on the website. Good communication from the shop. Product is great. Delivery was quicker than I expected."
"Ben was a great help in answering my many questions. The motorcycle seat I ordered is above my expectations."
"Rare part, great price and fast shipping to the US. Very happy customer."
"Great service. Good and easy info. Delivery as expected. Very nice work. And fast shipping."
Read all reviews on Trustpilot →
From eBay
"Quality 10. Value 10. Communication 10."
"Very nice product. Good quality stitching and fits perfectly. The gas tank hole lines up properly. I want to get the tank bags now to match. Highly recommend this product."
"Received in excellent condition. No damage. Fit and finish was more than I expected. I could not have been happier. Thank you."
"Thanks, great looking cover and faster than expected delivery, very fast."