Yoshimura RS-4 Enduro Exhaust System

Lighter and compact, the Yoshimura RS-4 Enduro Series exhaust is a great way to power-up the new CRF450X and CRF450L motorcycles.  Gain over 4hp with this proven, durable race-level exhaust system.  The muffler will operate with or without the spark arrestor insert. Complete system includes: Yoshimura RS-4 muffler Stainless steel head pipe Spark arrestor insert Springs and mounting hardware Installation instructions Benefits for the 2019 CRF450X & L Yoshimura RS-4 system include: Significant power gains with full system Full system incorporates a more "tucked in" header design, making it less susceptible to damage Header boasts a thicker 18 gauge spec that provides better protection in off-road conditions A USFS spark arrestor is included For closed-course use only.