My buddy has an exhauast shop and he said he'd make me a test pipe. I'm just wondering what the specs are for one to go with the stock exhaust. Length, Inner diameter? Any info would be greatly appreciated.

 

18 7/16 long. My cat measured 60/62 mm I.D. Probably 2mm carbon build-up. Stock DP was 55mm ID. Cat-back ID was 63mm. Make it out of 2.25 in. if you're never going to change your exhaust(fat chance). Or just go 3in and be done with it.

 

It will be awhile before I change the exhaust. I just found out I might be losing my job in a couple years. I'm not goingt to be spending much more on the car right now. Instead I'll be focusing on paying off my debts.
Thanks for the measurements

 

forgot to mention that the flanges don't line up. You can cut the tube and weld one flange on but you will have to remove your cat to get the clocking right.

 

Thanks! I wouldn't have thought about that.