Designed to be used with the stock exhaust system to offer a power increase while allowing your muffler to pass the 96 dBA 20" stationary test. Note: This accessory may be restricted to closed-course use. This accessory affects emissions; installation on EPA-regulated 2006 or later WR models constitutes unlawful tampering except when used solely for closed-course competition. YZ models are for closed-course use regardless of modification. This performance accessory does not meet California standards for off-road recreational vehicle usage regardless of model year.
