Will this affect my performance???
Will this affect my performance??? I have a Random Tech Catback with dual 3.5 inch outlets. I want to add a nice set of polished/stainless tips but i cant find any that will adapt to a pipe that large. If i change those pipes to 2.5 or 3 inches will this restrict my flow? The I-pipe will be untouched, just the dual outlets.
TECH Addict
Joined: Jun 2005
Posts: 2,660
Likes: 14
From: England
No 2.5" pipes out of the muffler with a dual outlet will be fine. GMMG uses 2.5" tubes after the Y split over the axle.
Only thing is 2.5" tips might look a little weedy on a large car like an Fbody.
Magnaflow make a lot of tips (much cheaper on Ebay than from Magnaflow!!!). Maybe have a look at some of the tips for diesel trucks as they are often available in larger sizes.
Either that or you could lop a bit of pipe off before each tip and add a reducer from 3.5" to something smaller to fit the tips.
Only thing is 2.5" tips might look a little weedy on a large car like an Fbody.
Magnaflow make a lot of tips (much cheaper on Ebay than from Magnaflow!!!). Maybe have a look at some of the tips for diesel trucks as they are often available in larger sizes.
Either that or you could lop a bit of pipe off before each tip and add a reducer from 3.5" to something smaller to fit the tips.
You're fine powerwise. The 3.5" I pipe will be the bottle neck in the system. The exhaust gas coming out of the tips has cooled down so much that you don't need the CFM that you need elsewhere in the system. You can buy some nice reducers that go from 3.5 to 3 or whatever as well.
