Quote:
Originally Posted by berty987
You may want to look at the article posted on planet-9 ref gutting standard cats, and the performance gain. Though the article is based on the 987 , the principle is the same on a 986. Personally I would buy a performance manifold without cats rather than gut the 986 standard units as the manifolds are so cheap. 987 manifolds are still very high priced , even for catless ones. If you gut standard cats you have the issue of a less than optimum gas flow , which will reduce power mid range. Lambda probe extenders may not work , but maxspeed offer ones with built in mini cats which appear to work very well.
987 Gen 1 - All Models Manifold / Header De Cat - Articles |
ive got a 986 which had the cat-less manifolds and just the rear cats also it only has the front lambda sensors,ive got new performance manifolds and back box,
with having only the front lambda sensors gutting the cats shouldn't bring on the cel light