Hi Chris I replaced my cat with Ed Uding's pipe this summer when I did my manifold gaskets. The difference is very noticable (and I removed the cold air intake valve too). My exhaust even pops and gurgles a little bit when hot now showing how much more easily it is breathing (and that it probably needs its mixture setting up again!). It's not just the restrictin of the catalyst that causes loss of power - the outlet port of the cat is surprisingly small too. With the cat removed the engine has noticably more torque and the pick up in 3rd at 50mph is a lot of fun. This car will never be great from a standing start with the stock ratios, but midrange is definitely improved. NB removing the cat would be illegal in many US states. Here in the UK the car's too old to have required a cat when manufactured, so it can be removed and still pass the MOT test. Martin #1458 #4426 Original Message: ----------------- From: Chris dursman@xxxx Has anybody tried this pipe to replace the cat on their DeLorean? -------------------------------------------------------------------- mail2web - Check your email from the web at http://mail2web.com/ .