regency

iTrader: (15)

I am making alot of changes to the truck right now and exhaust is one of them. I did some porting on a set of 243's i had laying around and milled them .010, also using some .040 cometics. I made the heads look as close as i could to a set of Patriot stg.2 LS6's i took some pics of.
I also have the 228R-112, Fast 90 mildly ported/LS2 TB, Underdrive Pulley, CAI, Pacesetter LT's

My exhaust at the moment consists of just comming off the headers (3" collector) with a 2.5" SBC collector reducer, back into a 2.5" dual in/dual out Magnaflow with built in X and regency tips welded to the muffler. Im thinking of going with 3" duals with x-pipe into the same muffler/tips combo!
Using this x-pipe kit
http://store.summitracing.com/partde...5&autoview=sku

S/C Z71

3" duals is too big. Dual 2.5" max.

00ChevyScott

iTrader: (10)

Single 4" would sound sick on your truck.

I don't think dual 3" would be way to big for your truck, since it is a 5.7 H/C

You might lose some low end. Have you looked into adding cutouts instead?

GMCtrk

iTrader: (27)

he'll be north of 400 rwhp. I'd go with dual 3" myself. He's rcsb so he's lighter too.

LS73K20

im running the same x-pipe.. i have the headmen tqSteps into dual 3" w/x-pipe to super40 flows.. seems to run pretty good and has good low end response and sounds good to.still have to cut those hangers off.. me and a buddy built the exhaust at my house...

regency

iTrader: (15)

so are you running the 3" kit??

regency

iTrader: (15)

do you know where in might find some video clips of a 4" exhaust

chevyguy7802

iTrader: (3)

Look on tech....some guys over there run a 4'' mufflex systems and they sound killer! Im running true dual 3" on mine!

00ChevyScott

iTrader: (10)

Theres a few guys running the stock 4" diesel exhaust on their turbo trucks. I'm sure one of them has a sound clip.

skyhighsami

iTrader: (8)

stock diesel isn't quiet 4 inches I believe it is 3 1/2