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I have the cat back bypass pipes from fabspeed they are great. No cel at all havn't gone for smog check yet I have a bud that does smogs they turn away most Boxsters cause they cant access the engine so when its smog time visual shouldnt be a prob. The o2 sensors are in the front cats no worries. I would recommend the bypass pipes the exhaust sounds so much better and there is some performance gain at least I can feel a difference.
Next are the headers from fabspeed. I had to have my manifolds welded up already I guess its common for them to crack. Anyway it was alot cheaper to have them welded then get new ones 2500 is alot of bucks.
Last edited by Joe T; 05-14-2007 at 12:38 PM.
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