Ive tried a BIG magnaflow, Its still loud to me. ill stick with stock for now and possibly get a cut-out
i vote Spintech all the way.. even with my headers, dummy cats, and true duals with x-pipe, my dual Spintech's are 1/4 as loud as the old Flowbastard was at idle.. but WICKED at WOT...
Truck: 05 GMC CCSB SLT Z71,
Go Faster: 5.3, 219/227 .607/.614 112, milled heads, eBay CAI, Circle D 2800, 3030 Built 60E, E-Fans, 3030 Tuned, LT's, Spintech Muffler, DuraGrip w/ 3.73's
Look Better: 10K HID's lows & fogs, tinted Chevy tails
the muffler i took off of my avalanche 2500 with an 8.1 is dual 3" in and dual 3" out, it was pretty quiet and would probably flow better than the stock 1/2 ton muffler and still be quiet. i didnt notice much difference except it was louder when i had a new exhaust put on it.
procharger p1sc, nelson tune, 42# marine injectors, walbro 255, lt's, ory, 4" volant cat back, PerformaBuilt level 2 pro race trans, trans. cooler with e fan, 2500 stall, aem wideband, energy bushings, spohn perf. trailing and panhard rods, mb & gear alloy 22's ( ya 2 sets, im big ballin), ss brake lines, drilled & slotted rotors, bla bla bla bla bla bla bla,
and ya it will beat a hemi.
what spintech were yall using...the one i had was really really loud!!!
04 Tahoe LT....4 buckets and all leather! Custom grind cam, rear mount, tb stall, 4.56s, gutted exhaust, 33/12.50s
I have dual 6" round 14" long magnaflows to a single 5x11x22 dual 3" in, single 4" out (3 mufflers) along with dual 3" magnaflow cats. It should flow like hell and its pretty quiet as you might imagine....although I dont know what I could do to make it any quieter if it wasnt
On my old 01 5.3 i had pacesetters 3 inch ory going into a stock muffler but had a cutout right before. I drove a ways to work and sometimes i dont really feel like hearing the truck so thats what i did. On my 09 i did the same thing quit when i want it and loud for the weekends......
2011 GMC Sierra 4x4 427 LSX 6-Speed
^^ thats pretty slick !
2009 CHEVROLET 1500 with a MONSTER 4.8 between the frame rails!!
Tuned by LSX Powersports ~ 4.10 ~ JBA Shorties ~ 4" Inlet/Outlet Spintech ~ Airaid Coldair
CST 3.5" Spindles ~ Camburg Upper Control Arms ~ 2.5" CCM ~ FFR Tie Rods
Full Throttle Suspension 3" Lift Blocks ~ Soft 8s wrapped in LT285/70/17 Silent Armors
^^^ Same thing I am doing. Got the LT's but no money to spare for a cutout right now.
Can't have loud pipes all the time with the baby.
2013 CC 5.3
81 C10 LS1 project
....dumped below cab...no muffler
NEIGHBORS LOOOOOOVE ME haha
blown transmissions are about as useful as 97% of the guys on this forum