I had the same bottoming out problem with one of the Pypes downpipes on my 66 GTO, with the same recommendation to grind the end of the pipe. And I also messed up the grinding operation. Then went to the local autoparts store and looked through their catalog and stock of exhaust donuts, ordered one where the OD was about right, and butchered the ID larger with a die grinder. Inserted it into the joint and it cured the leak. But now it sounds like it's starting to leak again, after about a year. I haven't looked at it to see what's changed. It'll be a lot easier now with the lift I just installed. I suppose I could have ground off just the right amount in the right spot to make it work, but I'd run out of patience with the original grinding modification because it was such a pain to take on and off lying on my back under the car.
|