From: dave2
Email: david.c.russell@lmco.com
Date: 19 Jun 2001
Time: 19:15:23Why do you want to replace. Virtually all 931 cats self destruct after about 40 thousand miles. The cermic that holds the catalyst crumbels due to old age, and get blown out the exhaust. What you have left is a three foot long three and a half inch pipe in the middle of your 2 and a half inch exhaust system. It still looks stock, has no back pressure, improves performance, and you car will still pass emissions with no problem, as long as you haven't screwed up the fuel mixture. These cars run very clean.