1. M4 xsr900
Super easy to install sounds great but very loud I installed the dB killer better but still loud
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-Saves 10lbs over stock
-Produces 8 horsepower over the stock system
-Stock db 89 @ 5,500 rpm/ M4 db 105 @ 5,500 rpm
-M4 Suggests reflashing of the stock ecu or a fuel controller to maximize power output
-304 Stainless steel tubing with high temp ceramic coating
Please Note: M4 Recommends re-flashing your stock ECU to unleash the full potential of all M4 products.
If you would like to reduce the db levels of this M4 Exhaust System Optional Stage 1 part # Q7 Quiet Inserts are sold separately and are available for purchase from SportbikeTrackGear.com using the link found below.
|M4 Exhaust Quiet Insert (Db Reducer)|
|Emissions Notice to Customers in California|
Important Emissions Notice to Customers in California
The State of California prohibits the offer for sale, sale, or installation of an aftermarket part, which alters or modifies the original design or performance of a motor vehicle's pollution control devices or systems, unless the aftermarket part has first been exempted from the state's anti-tampering laws and been issued an Executive Order (EO) number by the California Air Resource Board (ARB). Legal in California only for racing vehicles which may never be used, or registered or Licensed for use, upon a highway. Any California Residents who order this M4 Exhaust from Sportbike Track Gear llc agree they are doing so with the intention of using it on a closed course as outlined within the California Notice.