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Originally Posted by bigborian
I have a 99 boxster, ic then i will keept he cats since i need to smog all the time damn cali haha.
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Picked my Box up in Sanfran a month ago. a lot hotter out there than I thought.
I really would like to know what kind of HP gains I would get by taking off my CATs.
I have googled the subject and haven't found anything. My first car was a 1980 mgb limited, thats when i fell in love with convertibles. The first thing I did was to take off the cat and put headers and a HO webber carb. It really pepped up that little engine. I read a thread about a guy who put a supercharger on his car "OHboxter" I think, But that is a lot of $$ and time. I am just trying to squeeze out every bit of power without jeorpardizing my engine.