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i've got an intake and that's really the only engine mod i've got. i have a single in/out magnaflow (which i've been told is one of the least restrictive mufflers for our cars). my question is this, what is the best performance upgrade i will get out of this setup, removing the cat and just having the 2.25" pipe back to the muffler, or should i get a hiflow cat that will help me more? or should i not even worry about doing either, as though the effects of either will not be that big since i have no nitrous or power adder? thx a lot.
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2000 NBM M6 Camaro Z28<br />323/335 -
Get a high flow cat. I have 3" exhaust all the way from the "cat" back. It makes the car sound deeper and takes the rice out. Your hp and torque curves are higher so you will have less torque in lower rpms but more in higher. If you wanted to keep moderate backpressure I would go with 2.75 piping.1999 Firebird Black<br />A4 3.08 gears<br />Mods: Carbon Fiber Whisper Lid, Raised Air Box, K&N Air Filter, Direct Hits Ignition, Flowmaster American Thunder 3\", 160 Degree Hypertech Thermostat, SLP Fan Switch, 3\" High Flow Cat<br /><a href=\"http://www.cardomain.com/member_pages/view_page.pl?page_id=273903\" target=\"_blank\">My car on Cardomain</a>
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