Many cars only have one cat - Subarus have two. If someone doesn't know any better, they'll see one catalytic converter and pass you. Get a Bosal shorty DP (divorced wastegate) - this will remove the first cat in your DP. Either gut the 3rd (free), or buy a catless midpipe and weld a high-flow cat into it (or just get something like the Perrin that comes with one).Originally Posted by 400hpWRX



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