This bikes stock exhaust has an EXUP servo that is not used on the aftermarket exhaust. This eliminates the servo and tricks the computer so that you can run your aftermarket exhaust with out the engine constantly going into "Limp Mode" and making the Check Engine light come on.
Graves Yamaha Exup Eliminator
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Works as advertised and easy to install.
Great space saver , easy to use
Graves Exup Eliminator does exactly what it should. Install is easy, just plug and go. Purchased it to install a Termignoni full system on my 2010 R6. Works perfect. Only thing I've noticed is that on short jaunts, once you park, and go to start it again, it doesn't want to start with the usual punch of the start button, it has to be held down just a second or two longer for it to catch.
Works exactly how it is supposed to, took about 3 seconds to install. expensive for what it does though.
Works great and gets rid of the check engine light for the removal of the EXUP valve. Only reason I gave it 4 stars is I think it's kind of pricey for what it does. Good product and does what it says it will do.