I'm getting a DP fabbed and I was going to go with 2.25" back to the stock 2.25" exhaust. Is this cool? If I ever upgrade my exhaust to 2.5"+ the smaller DP should still be fine right? I realize it will be a little more restricted, but nothing major right? Thanks!


JP

 

mines being built tomorrow and it will be 2.5 all the way through. maybe even bigger if he can get it all to fit. rule of thumb for turbos, dont go below 2.5 and bigger is better

 

If you have a choice, Don't use 2.25 for a DP. 2.5 min for DP's. 3" Optimal!!!

As for exhaust, If you gonna get it made up might as well do it right the first time 3" if you know you gonna bost. 2.5 is alright but you might find yourself down the road wanting 3" and wishing you did. The only reason why mine is 2.25 is I got the exhaust on it 2 years before I even thought of boosting it.

 

the cat is your problem like everyone else has said. my ---- did the same thing. went from 10 psi open dp. then when they hooked it up i lost 6 psi and it dropped to 4 psi and it felt like crap. so i went and got a straight pipe done and it was all good afterwards. if your cheap just get the straight pipe and you'll be fine