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RevZilla will match any advertised price on new merchandise available through another authorized U.S. dealer.Price Match Policy
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Extended Holiday Returns
Any items purchased on, or after, November 1, 2017 have had their accepted return window extended until January 31st, 2018.Extended Returns Policy
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Yoshimura RS-4 Exhaust System
The Yoshimura RS-4 full exhaust system has been put to the test and has proven its capabilities at the highest level of competition. In 2010 the RS-4 helped Ryan Dungey claim the AMA 450 Supercross and Motocross championships in his rookie season. The Yoshimura-backed GEICO Honda team also took home both East and West Coast Supercross Lites titles in 2012 using the Yoshimura RS-4 exhaust.
Utilizing the same R&D that helped bring success at the national level has resulted in a unique exhaust design that provides an unrivaled combination of power and quiet exhaust note. The Yoshimura RS-4 Pipe features an innovative carbon cone end cap, a two staged stepped baffle, and a polyresonant duplex chamber which acts as a muffler within a muffler to help save weight and centralize mass.
Nearly all Yoshimura exhaust systems that have won Motocross or Supercross championships are members of the Yoshimura Signature Series. All Signature Series pipes have been tested, documented, and marked as required by federal and state regulations. Working in conjunction with factory race teams has allowed Yoshimura to increase performance, keep sound levels to a minimum and centralize mass. The end result is a exhaust system that gives you an unparalleled competitive advantage.
- Pentagonal-shaped sleeve
- Polyresonant front muffler chamber which helps reduce noise
- Two-stage stepped baffle
- Yoshimura Signature Series muffler
- Carbon fiber end-cap
- Stainless Steel or Titanium Head pipe
- CARB/EPA tailpipe emissions compliant
- 100% Made in the USA
- CRF250L 2013-2016
- CRF250L 2017
- CRF250L Rally 2017
- CRF250R 2010
- CRF250R 2011-2013
- CRF450R 2009-2010
- CRF450R 2011-2012
- FC450 2016
- 250 SX-F 2016-2017
- 250 SX-F 2012
- 250 SX-F 2013-2015
- 250 SX-F Factory Edition 2015
- 250 XC-F 2016-2017
- 350 EXC-F 2012
- 350 SX-F 2016
- 350 SX-F 2013-2015
- 350 SX-F 2011-2012
- 350 XC-F 2016
- 350 XC-F 2014-2015
- 450 SX-F 2016
- 450 SX-F 2013-2015
- 450 SX-F Factory Edition 2012-2014
- 450 XC-F 2013-2015
- DR-Z400S 2000-2017
- DR-Z400SM 2000-2017
- RMX 450Z 2010-2011
- RMZ250 2010-2016
- RMZ450 2008-2016
- RMZ450 2018
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We show real-time availability on this product page when you select the size/color item you want. Most items will ship the same business day an order is placed,however if an item requires additional processing time a message will be shown indicating such.
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Doesn't fit or just not happy with it? You can return any new, unused and unaltered item within 30 business days of delivery receipt of your item. We will issue a full refund to your original payment method.
See our full Return Policy for all of the pertinent details.