Will my 0-60 decrease when i intsall a y pipe. I have a 01 auto, im guessing about 7.7 to 60 now with stock. what would it be with y pipe, what abou y pipe and berk intake, thanks

 

your 0-60 time would only improve (decrease).
the y-pipe is the single most benificial performance mod for an NA car.
and to really take advantage of it, you need some method of increasing air flow in. whether it be a berk, stillen, or GAB.
and make sure and reset your ECU so your car "learns" the mods.

 

I'd say with a y pipe 0-60 in 3.2 secs. The 911tt's better watch out