Yoshimura RS-4 Signature Series Slip-On Muffler SS/AL/CF
Yoshimura Signature Series exhaust components are the answer for riders faced with ever-tightening noise and emissions regulations at the federal level. All Signature Series components are independently tested, documented, and marked as required by state and federal regulations as CARB/EPA-compliant.
The work that went into developing the RS-4 slip-on muffler design paid big dividends during development in AMA Pro Racing. That research was directed at developing the RS-4's unique design that provides an unrivaled combination of power and a quiet exhaust note. The RS-4 muffler features a polyresonant duplex chamber, a two-staged stepped baffle and an innovative carbon cone end cap.
Easy-to-install slip-on design
Pentagonal-shaped sleeve
Front muffler cap functions as a polyresonant chamber which helps reduce noise
Two-stage stepped baffle
Carbon fiber end-cap
CNC mandrel-bent stainless steel tail pipe
Includes instructions and all required installation hardware
80dB EPA noise emissions compliant
Product Note:
Specification
Details
CARB Approved
Yes
Country of Origin
USA
Header Construction
Stainless Steel
Muffler End Cap
Carbon Fiber
Muffler Sleeve
Aluminum
USFS Approved Spark Arrestor
No
Warranty
1 Year Manufacturer Warranty
Vehicle Fitment
Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.
Yamaha
YZ250F 4-Stroke 2024-2026
Customer Reviews
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Questions & Answers
Will this really fit a 2018 Husqvarna FE501?
By Ladd
Yes, just choose that year/model before adding to your cart and you will receive the correct slip-on for it.
Is this the same loudness as stock exhaust
By Anon.
This Yoshimura RS-4 will be much louder than the stock exhaust.
Have a question? Please ask our experts and customers who own this product.
