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Yoshimura RS-4 Enduro Series Slip-On Exhaust

Item: 339171


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Yoshimura RS-4 Enduro Series Slip-On Exhaust

All Yoshimura Enduro Series exhaust components are equipped with USFS-approved spark arrestor, have forest-friendly noise levels, and are tailpipe emissions compliant.

The work that went into developing the RS-4 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.

  • Pentagonal-shaped sleeve
  • Front muffler cap functions as a polyresonant chamber to reduce noise
  • Two-stage stepped baffle
  • Carbon fiber end-cap
  • Includes all required hardware and installation instructions
  • USFS-approved spark arrestor
Specification Details
CARB Approved Yes
Country of Origin USA
Mid-Pipe Stainless Steel
Muffler End Cap Carbon Fiber
Muffler Sleeve Aluminum
USFS Approved Spark Arrestor Yes
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.

  • CRF450X 2019-2024

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