Contour Enthusiasts Group Archives Forums Modifications Forced Induction benefit of 3" dp over 2.5"?

since vortex technical forums are pretty much useless anymore, what kind of benefits does a 3" DP have over a 2.5". i am currently running a 2.5" DP into a custom 3" exhaust (1 muffler, no cat). any really significant change?

~Andrew

On my turbo kit that I made, I have my DP start out at 2.5" and then it transitions to 3" about where my wastegate plumbs into it. If I had my wastegate vent to atmosphere, it could've been 2.5" with no issues.

so not worth the $375 in your opinion?

~Andrew

From everything I've read, hell no! If you vent your wastegate to the atmosphere 2.5" is more than enough.

I did my crossover pipe, DP and cat-back for about $600! That's 321 SS from the headers to the turbo, and 304L from the DP back, stainless bullet cat, 2 stainless Apexi N1 mufflers!

$375 for only the DP is TaXiNg!