CSL
Well-Known Member
With all said and done, where does number 1 rank for you? I am coming from a built and cammed GT500 without cats and it was damn loud even with stock mufflers. I am hoping to have something more civil, but not like a stock 07-09 GT500. I'd like to drive in sport and leave it alone, but removing the resonators is tempting. Is it borderline obnoxious loud in sport without the rez?I've now run 4 setups on my car.
1) Stock. Resonators + Cats + Mufflers
2) No Cats + Stock Resonators and Mufflers
3) No Cats, no Resonators + Stock Mufflers
4) No Resonators + Stock Cats and Mufflers
Right now I'm on setup #4 and the resonator removal is permanent. So which did I like best? In terms of volume and sound, I think #2, just removing the cats. It was loud, really loud and had a really good tone without being overbearingly harsh. Removing the resonators too made it seem more weezy, maybe more like it was slightly underwater. The downfall of not running the cats though is the fumes (and being illegal and killing polar bears). It wasn't something I would run permanently on this as a street car. If it was a track-only car, that'd be a different story, but then I wouldn't have gotten the Tech pack. ;)
So now I've put the cats back on, don't have to worry about the CEL on my stock tune, and won't piss off my neighbors or anybody within 100 feet of me and I don't feel like I'm sucking on the tailpipe just sitting in the driver seat. I'm fine with this. The resonator delete gives it much of the same growly characteristic of not running cats except for the volume being way lower, maybe even a few more pops when lifting off the throttle.
What is right for you? It all depends on what you're looking for. Track-only or can live with the consequences? Take the cats off but leave the resonators on. Want a little bit "more" from the stock setup? Just take the resonators off. I really don't recommend taking both off. But that's just my opinion.
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