I have recently put a 2 chamber thrush welded (2.5 in) on my 2000 silvy. It sounds good at low rpm's 1200 to 3000. After that it sounds like the exhaust is being restricted, it sounds like alot of air going through a small hole. Is the 2.5 in to small or is it a plugged cat? Any ideas? Thanks
2.5 is plenty big.
2000 Silverado ECSB- 5.3 CAI, Pacesetter LTs, ORY- Pipe, Magnaflow XL, E-fan, Ported T/B , Nelson Tuned, Built 4l60e, Circle D Stall, 3.42s G80, 2-4 Drop, Hertz Highs, Rockford 501s
2004 Buell XB12s
Originally Posted by LamboDoNoMo
I know this is a old thread... but it sounds the same way on my turck
2000 silverado 4.8 5-speed
if yours is dumped all chevy v8s sound like that at wide open throttle IMO especially with that flowmaster
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
Disagree. Most people around here run magnaflows and i haven't never heard any of that out of them
04 Silverado Z-71 Extended Cab
Magnaflow, 10.4 TV 50 wires, tr-55ix, Synthetics, HID's, JL audio, 33.5", leveling kit, tuned, CAI, vette servo, cam, valve job, pacesetter. 9.3@77.5 and 14.5@93.4
06 2wd
custom cam, tune, 3.73's, servo, HID's, 10.4mm wires, long-tubes, CAI, magnaflow, 2.5" shackles, Circle-D 3200, UD, JL Audio 4.1, Alpine 5ch
2.5, stock is 2.75, I went up to 3" on my 4.3
2006 SilveradoLittle Black Bitch
a single 2.5 is tiny!
01 Silverado
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