2.5 DP gain

[95GST2841]

I got 2.5 back exhaust..

I'm thinking of ordering a 2.5" downpipe and running about 4ft of 2.5inch piping afterwards? Would this hurt my car other then it sounds like crap?

any decent gains?

 

[SkyLineGtR-R34]

Slap it on and you'll find out

 

[90tsi]

2.5 all the way won't hurt anything. And it shouldn't sound like crap either.

 

[chicagoavenger]

I'm assuming just 4 feet of pipe no cat and obviously no muffler. It's gonna be loud and more than likely to get pulled over

 

[Ultimatedsm]

Tell you the truth, on the stock turbo, the gains aren't much. However, if you have a big 16g or something, then you will notice bigger gains. Remember engines taking 325 CFM (Thats what the T-25 flows) "in", so it will be flow out the by products and air proportioned to the intake flow. The stock exhaust can handle the T-25 no problem, however, if you have a EVO 16g or something which flows 550CFM, now your exhaust isn't efficient enough to flow that pressure out, so it becomes a major restriction.