Well the tuner who will be tuning my car asked me to do a compression test on my car before i take it to him and i got 190 at all 4cylinders on my b18b..is 190 good?.... and he said to get 2.5" piping? but most people i kno with turbo tegs use 3inch exhaust???

 

is it a stock motor??? numbers will vary, as gauges are different, so as long as all 4 are even, you're good. depends on you power goals for the exhaust size needed

 

Yea all the internals are stock.... and im just lookin for 250hp for now untill i build my bottom end

 

^^

 

2.5" exhaust will be sufficient for your needs

 

2.5" will work, but if you going to buy a whole new exhaust, just get a 3" and leave yourself plenty of room for future growth.

 

Yeah, 2.5" won't be much of a restriction. But if you don't have an exhaust yet, I'd just go with 3" in case you're ever looking into pushing more power.