random technology downpipe?

hey i just ordered a "Random Technology High Flow Catalytic Converter" from PFYC.com with a 2.5 outlet insteat of the 3 inch....i have a dynomax exhaust and stock exhaust manifolds...was 2.5 the right choice or should have i gotten the 3?
thanx

hey i just ordered a "Random Technology High Flow Catalytic Converter" from PFYC.com with a 2.5 outlet insteat of the 3 inch....i have a dynomax exhaust and stock exhaust manifolds...was 2.5 the right choice or should have i gotten the 3?
thanx

That is probably the right choice for your current setup. Although I think a 3" downpipe, 3" cat(or no cat), and a 3" res would be better for the 3.4 pulley.

That is probably the right choice for your current setup. Although I think a 3" downpipe, 3" cat(or no cat), and a 3" res would be better for the 3.4 pulley.

Both of the downpipes with different outlet sizes have the 3 inch downpipe and 3 inch cat entrance. It is 2.5 from the cat exit into the catback. But yeah, you made the right selection for that exhaust system.

thanx, i was wondering if the whole thing was 2.5 or just the outlet...but u answered the ?? its just the outlet. also i have an intake, 3.25 pulley may change it to 3.4 for now, DHP 1.0 and throttle body....hopefully soon i will have the SS intercooler

Both of the downpipes with different outlet sizes have the 3 inch downpipe and 3 inch cat entrance. It is 2.5 from the cat exit into the catback. But yeah, you made the right selection for that exhaust system.


Oh yeah thats right Joe. Thanks for clearing that up. I guess you would only need the 3" opening for the SLP Loudmouth catback or a custom 3" catback.

Although if you are planning on doing the 3.25 pulley I would cut the 2.5" flange off along with the 2.5" tapered section, weld on a 3" flange, and run 3" pipes back to the Y. But since you already have the dynomax 2.5" catback I guess that isn't a worthwhile option.