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My current setup on my V6 3.8L is Pacesetter ST Headers and Y-Pipe, Stock Cat, Stock S-Pipe, Magnaflow Catback,.... i still have the S-Pipe that came with the exhaust. my question is what In/Out do i need for a highflow cat?? thanks guys!
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What size magnaflow would that be? 3" or 2 1/2"1999 Firebird -
this is what the magnaflow site says
3.8L V6, DUAL REAR EXIT,
2.5" SS tubing, 3.5" slash/p-SS tips i assume its 2.5Comment
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Yeah some people have the 3" magnaflow, but if yours is 2 1/2 then you can get a 3" in 2 1/2 out cat. That way you could put the s-pipe on there. But of course you would have to weld a o2 sensor into it.1999 FirebirdComment
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