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I am planning on doing the SVT header swap and was wondering what the collector diameter on the header is? Also, if the diameter is 2.5 is there still a way to put a 2.25 cat back on the car? I was going to get the FS Stealth exhuast because i heard that after you put the header on it doesnt sound so good. I believe the FS exhaust is 2.25 too. I was considering Magnaflow but after reading another thread and someone said they had the SVT header/Magnaflow combination and it sounded like a pissed off can of bees! lol Any help would be greatly appriciated. Thx
 

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well when that mention that pissed off bees hives, its was when it was at high revs... crusing isn't that much of a problem... its only when you are putting hte metal to the pedal.

there is always a way to get a 2.5 to connect to a 2.25, BUT you will be restrictin the air flow by .25 inch. - i just hope that he flange peice is big enough to cover the hole/bolt holes
 
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