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View Full Version : Exhaust size???



BryanRT360
05-13-2008, 04:41 AM
I have a set of spintech mids on order. I gonna get a custom exhaust bent up(mandrel) what ever i do its gonna be true dual, either with an X o H crossover.

So.. what size piping? I'm am leaning more toward 3" or should I stay with 2.5". The Truck isn't my DD. Its more of a Drag/show/weekend toy. I trailer it to most of my events.
spin tech have a 2.5" collector? so whats the point of 3" pipes if the collector is only 2.5.

Mods: 2.02 EQ magnums, 218/224 113lsa cam, M-1, Mp 1.7 rr's, 58F&B, Msain tranny and 2800 stall. B&G M-1 flash. 100 shot Ran 12.8@104

I will be adding Spintech headers, SCT tune, 150 shot, bigger stall and gears.

BTLFED R/T
05-13-2008, 04:53 AM
I think the 2.5" would be fine.

bad360rt
05-13-2008, 10:43 AM
Spintechs have a 3" collector. 3" duals wouldn't hurt, these trucks like to breathe.

Hugh Jassole
05-13-2008, 12:19 PM
our engines are basically the same. I'm using the spintech system, 3" true duals with an x pipe. I got what was supposed to be their loudest mufflers too.

ChrisR/T
05-13-2008, 03:01 PM
I run 2.5" duals with an H-pipe on my truck. Dynomax ultra-flow welded mufflers, and it sounds really sweet!

Honestly, what's the cost difference? If it's several hundred bucks to go from 2.5 to 3", i'd keep it 2.5 and save the money.

Hugh Jassole
05-13-2008, 03:07 PM
I run 2.5" duals with an H-pipe on my truck. Dynomax ultra-flow welded mufflers, and it sounds really sweet!

Honestly, what's the cost difference? If it's several hundred bucks to go from 2.5 to 3", i'd keep it 2.5 and save the money.


If I remember correctly it was 75-100 to step up from the 2.5 to the 3 inch system. I bought big for the future, cause I thought I'd be going with boost down the road. Now I've changed my mind there and I'll just build a nasty 426 stroker and run a 100 shot. That'll be good enough. And for now, my little ghetto build 360 is running nice, 1800 miles and purring like a (angry) kitten :woot:

ChrisR/T
05-13-2008, 03:10 PM
Meow?

I need to find a 360 block that i can build on. I've got a itch to build an 11:1 aluminum headed 360.