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the previous owner of my car installed a magnaflow muffler and 2.5" dual pipes comming out to the back of the car. he did not install a full catback system though, leaving the I-pipe to stock 2.25". Now what would be a smart upgrade for the I-pipe? I'm thinking either 2.75" or 3". Im gonna be running 9psi supercharger, and i have headers. ive read up on backpressure and exhaust velocity, but i just need help on which size would be better. thanks.
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1999 Firebird Y87/W68 -
Re: New I-pipe diameter?
what is the inlet to the muffler?
I would match that, a 3" I pipe to a 2.5" muffler inlet would be kind of pointless1999 Camaro Z/28
1973 Firebird Formula -
Re: New I-pipe diameter?
good call. ill find out tomaro when i go back to work on the headers install
1999 Firebird Y87/W68Comment
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Re: New I-pipe diameter?
don't forget the over axle pipe
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Re: New I-pipe diameter?
haha yeah i know. i meant all the piping from the cat to the muffler
1999 Firebird Y87/W68Comment
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