The EVP Arctic Cat 1100T billet aluminum Blow Off Valve is a direct replacement for the factory plastic diverter valve, but functions differently and is far more durable and reliable with high boost applications. The addition of our valve greatly improves responsiveness in on/off/on throttle situations. Mountain riders will appreciate this when they are doing a climb and have to let off the throttle to do a direction change, then get back into the throttle. Trail/Lake racers will notice substantially reduced lag when coming out of a corner because the turbo will remain spooled. This upgrade also solves the compressor stall issues that plague the stock valve. The EVP BOV has additional safety features as well. Our valve has a .8″ ID inlet and outlets compared to the factory .4″ ID (look at the inside the outlet and you will see how small the opening is) The kit includes new silicone intercooler and intake pipe connector hoses and European style hose clamps and silicone vacuum hoses. The vacuum hoses are pre assembled with pinch clamps. Fully detailed instructions are included with the kit.