Sorry, missed this the first time through... I dont along with thousand other's dont use a by pass or BOV ... a BOV will make my car run like I have a 800 lift cam.. at idle and make it fall on its face after a shift - too much gas, and unmetered air, and a bypass would probably help my shifts but I dont feel like messing something up that is already working... the car didnt come stock with one and 165k miles later, why bother doin one now? when I get a hybrid, a by pass will be on their with it for sure, maybe even a turbotimer if I feel rich that day...

but different cars act differnet and on a sr20, I would use a blow off or bypass.. either one works