89_740Turbo
New member
- Joined
- Apr 10, 2018
- Location
- Central New Jersey
Hey everyone,
Back again for another question. Mind you, I've already tried researching this online but only came up with Subaru forum stuff. I wanted to ask here.
I am buying a 16T turbo, high performance fuel injectors, manifold, all the appropriate attachments and a 3 inch downpipe that will reach the catalytic converter. So, essentially, I will be creating a full turboback exhaust, but really just a catback since I really only need piping from the cat to the muffler.
Anyway, my question is - Is it logical/feasible/performance restrictive/stupid/an OK thing to do/a stupid thing to do, to have a 3inch downpipe attach to a 2.5 inch catback exhaust?
If it's not worth it, that's totally fine. I found a 3.00" diameter universal fi mandrel bent tubing kit online I'd buy and just fabricate/turn into an exhaust. I was just trying to save myself a little time and money IF possible by buying a prefabricated 2.5 exhaust online.
I've read 2 very different answers about this. One being negative that the 3inch to 2.5inch will be restrictive and will give increased HP but not a lot. The other being positive that the 3inch to 2.5inch theoretically would create higher thrust. Who knows. Anyone have anything to say on all of this?