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Signature RS4 Aluminum Slip On Exhaust - For 16-18 WR450F & 14-17 YZ450F/FX

Retail Price: $415.78
You save: $20.79  (5%)
Our Price: $394.99

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  • Model: 234812D321
  • Manufactured by: Yoshimura


For 16-18 WR450F & 14-17 YZ450F/FX

  • End Cap Finish: Gloss
  • End Cap Material: Carbon Fiber
  • Finish: Natural
  • Material: Aluminum
  • Mid Pipe Material: Stainless Steel
  • Muffler Sleeve Finish: Aluminum
  • Muffler Sleeve Material: Aluminum
  • Type: Slip On
  • Use with OEM Headers: Yes
  • Pentagonal-shaped sleeve
  • Front muffler cap functions as a polyresonant chamber which helps reduce noise
  • Two-stage stepped baffle

The work that went into developing the RS-4 muffler design paid big dividends in 2010 with Ryan Dungey winning the AMA 450 Supercross and Motocross Championship series as a rookie in the same year, and again in 2012 with the Yoshimura-backed GEICO Honda team winning both 250 Supercross Lites titles. That same R&D has been directed to developing the current generation RS-4 - a unique design that provides an unrivaled combination of power and a quiet exhaust note. The RS-4 features a Polyresonant duplex chamber, a two-staged stepped baffle and an innovative carbon cone end cap.

This part fits the following


This product was added to our catalog on Tuesday 27 September, 2016.

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