Ok I changed the oil in my car and got a better view of the exhaust up front. I know there is stock manifolds, stock y pipe and stock cat. The y pipe has compression bends (ribbed) but the cat back has mandural bent 3" tubing into a muffler and duel 2.5" pipes into stock tips. There is no markings on the muffler. I would like to know if anyone can confirm without a doubt this exhaust is bone stock.

here is a vid of the exhaust. Sorry about the volume.
http://videos.camaroz28.com/video/f3...3001694042.htm

Thanks much!

 

Looks and sounded exactly like my stock '93 z28 exhaust. I vote yes.

 

I say stock.

 

Sounds like stock to me.

 

sounds way raspier than my 95 did with the stock setup, if it seems a little louder than normal (i cant tell) i might think the cat has been gutted and had a pipe put through it. You can usually tell that right away by the smell of the exhaust though. I also thought the stock setup was 2.5" instead of 3" but i could be wrong.

 

Shouldn't the I-pipe be 2 3/4 inches and stepped down to 2 1/2 inches clamped to the muffler and the tailpipes 2 1/4 inches welded to the muffler?

 

I dunno

The cat is there. I passed E check when they put it on the dyno thingie so I don't think its gutted.

I'd almost bet money its a 3" pipe going to the muffler and I know for a fact its mandural bent also. The pipes come out of each side of the muffler which is mounted sideways. They arn't welded on either.

 

That exhaust is not stock. The cat has definitely been gutted judging by the amount of rasp when you let off the throttle. A stock system will not do that and is much quieter.