04 4.8 Exhaust

[mitchdakid]

So getting ready to build me an exhaust, is it ok to make it a true dual system, or do I need to stick with just one 3' pipe. I want to make it a dual 2 and1/4 that exits out the side with 2 flowmaster 40's. I have heard people say that true duals could be damaging. Any ideas?? Thanks

[Crawdaddy]

Well, with an 04, you're going to have to make some concessions for various things. The first one that comes to mind is oxygen sensors. You should have AT LEAST 1 oxygen sensor on the exhaust, if not 4. If there's a O2 sensor after the catalytic converter, you're gonna have to keep a cat there so that the readings to the computer aren't out of whack. That is a V6 or V8 right? I'm assuming that you know if it isn't a V motor, you really can't do it easily...

[mitchdakid]

Well, with an 04, you're going to have to make some concessions for various things. The first one that comes to mind is oxygen sensors. You should have AT LEAST 1 oxygen sensor on the exhaust, if not 4. If there's a O2 sensor after the catalytic converter, you're gonna have to keep a cat there so that the readings to the computer aren't out of whack. That is a V6 or V8 right? I'm assuming that you know if it isn't a V motor, you really can't do it easilyIt i...



The 4.8 is V8 and it is a vortec, I will leave all the sensors, just put them in the new exhaust and sorry I meant to mention it will be a cat back. Just was not sure if this would help performance or kill it, because there was no back pressure.

[Toymyster]

If it's a cat back, then it's not a "true" dual. Since it is cat back, it shouldn't affect much of anything!! Most of the needed back pressure is provided by the cat anyway.