View Single Post
manrico manrico is offline
Registered User
Join Date: Oct 2008
Posts: 2
Porsche Crest Cat by-pass and emissions


Does anyone out there feel that the use of a catalytic by-pass pipe may cause
their P-car to fail emissions? I have a 1980 911SC and in the past have used a
cat by-pass and have switched back to the original catalytic converter when the bi-annual emission test rolled around. Am I wasting my time? Can I just leave the by-pass pipe on and not worry about it? I prefer to go with the by-pass to reduce weight and for a slight performance gain.

Old 10-13-2008, 01:49 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)