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Fresh air injected into the exhaust system on modified sportbikes can cause back pressure in the headpipes and muffler due to unburnt fuel from modified fuel mapping combined with additional oxygen spontaneously combusting in a high heat environment. Our blockoff plates will stop the annoying and possibly damaging back pressure from occurring while allowing you to remove a few pounds in associated valves and hoses from your bike. On late model EFI bikes with 02 sensors, ESPECIALLY when using Dynojet's Power Commander V with the Autotune feature, the air injection system MUST be blocked as it will introduce additional oxygen into the system which will skew your 02 sensor's values and make it impossible to get a correct tune.
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Important Emissions Notice to All Customers especially those 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 (or residents of other US States) who order this part 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.
Important Emissions Notice to All Customers especially those in California
For race track use only, NOT LEGAL for street use.
