exhaust cut outs
 

2000 silvy, 5.3

Sounds kick ass, but is it even feasable with the backpressure issue?

RE: exhaust cut outs
 

sorry to sound like a noob, but what back pressure issue?

RE: exhaust cut outs
 

on the newer engines "4.8 5.3 6.0" You need a certain amount of backpressure to run right. Smoke put true duals with a crossover on his pickup and had to add restrictors later because it didnt have enough backpressure, and i would think this thing would have the same prob, unless of course he is doin it just to uncap em in town and give people a show, and not for any performance related activity whatsoever

RE: exhaust cut outs
 

what kind of setup you got there?

RE: exhaust cut outs
 

me? I have a 1 into 2 flowmaster 40 on mine, this fella in the video has electric cut outs

RE: exhaust cut outs
 

The idea is when your racing it, once it is up to highway speed backpressure doesn't matter. You leave them closed when launching and at about 45-50 I'd say, you open er' up which makes for more breathing which makes for more top end power! :D

RE: exhaust cut outs
 

Just watched the video and that guys truck sounds like garbage! I'd have to say it is definitely not for impressing anyone.[&:]

RE: exhaust cut outs
 

depends on what you call "impressive"... i know a guy that used to drive a z71 with what he called "true duals"... he had two completely separate pipes with no cats or mufflers... no x-pipe, no h-pipe, nothing... made lots of racket but sounded like straight poop... but the noise level was impressive, i guess

RE: exhaust cut outs
 

and btw if you listen close in the video you can hear the truck doesn't idle right with the cutout... its trying to die on him... so i guess the lack of backpressure is hurting him

RE: exhaust cut outs
 

Did he do the cutout before or after the cat? I couldn't really see but either way he could be causing the O2 sensor to get ticked off.