buy a G.F.B blowoff valve from mrtralley that is the one i use and have never had a problem it bolts right up to the factory spot no adapters need and it is a dual bypass which means it blows into the atmosphere and also recirculates to keep things running smooth. I would only suggest running a full atmospheric blowoff valve if you have some sort of enginemanagment to tune it to run less rich when the blowoff valve goes off that is why cars backfire or some even stall.