Exhaust size
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More Turbo
Joined: Sep 2002
Posts: 513
Likes: 0
From: Alberta
Exhaust size
I'm about to redo the exhaust on my Crewcab with a 390. My plan is headers, 2 1/2" pipe into a dual 2 1/2 in, single 3" out 5x11x22" oval magnaflow, then 3" for the tailpipe and maybe a bling tip. All the turns will be mandrel bends. Is this going to flow enough? I'm going to dump it in front of the passenger tire. Anyone know how this muffler sounds?
Fleet Mechanic
Joined: Aug 2007
Posts: 1,815
Likes: 248
From: Piney Woods of East Texas
Don't go any larger than 2 1/2" as you start loosing low end response do to lack of back pressure. If your using the x pipe you may want to drop to 2 1/4 since your using 2 pipes.
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afinepoint
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Sep 21, 2006 04:36 AM
zsir
FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428)
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Sep 1, 2005 12:30 PM
