Sounds like pebbles in my exhaust?
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I have noticed that under heavy acceleration between 4500 and 5500 rpm I hear noise that sounds like pebbles or little rocks flying through my exhaust. I have new kooks headers (coated) and X-pipe with cats. I also had a new LS7 clutch, custom cam, and valve train installed. I have just noticed this in last day or so.
Any ideas ?????
Any ideas ?????
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I think headers seem to amplify valvetrain noise. With the combo of new headers and an aftermarket valvetrain(which is almost always noisier than stock) I would say its probably normal. But im no expert lol
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Thanks guys I will check and see what type of cats they are. I had the car dyno tuned at VASpeed and know the tune is good. I think it may be the cats even though they are brand new. I know that every manufactured product is subject to some defective so I hope it is the cats.