I want to take my cat off an just run straight pipe will this cause me to lose bottom end and will it hurt my car any. What good can come from me doing this to my car?

it would be louder, flow better, your check engine light will come on, and you might lose to much back pressure if you have a straight threw muffler.

Im not doing it now got talked out of it but thanks Im just going to buy a high flow cat from magnaflow to match my catback from magnaflow

that what i have and i just took my ricer cannon off for a dynomax super turbo series muffler and i swear its faster (back pressure is key i guess)

This is not on the same track as the other comments (catalytic converter)..... but i have straight exhaust on my 00 cavi and tonight i bought the rear section off an srt-4. i think it should bolt up with some custom hangers, but anyway Chris, do you think having no muffler, but still having the stock cat will affect my power? I had a flowmaster on it for a little while, and it seemed a little quicker with the back pressure...?

ERIC

ya i put a thursh turbo muffler and i have a gutted cat and my car gained some serious power for no apparent reason lol

back pressure is restriction... restriction is bad.

you do not need backpressure, you need exhaust flow velocity.

that being said, by changing the cat out for straight pipe, you will gain more flow up top but lose some down low due to turbulence in the exhaust stream.

it's give and take...

I agree with what strat81 said.

you will gain in 1 area, loose in another.

I would go high-flow cat, and nice muffler with the correct sized piping, and you will get the best results.

I have a magnaflow cat back so im going to get a magnaflow high-flow cat an see what happens

John, when you say correct sized piping, do you mean the stock sized piping, or maybe something a little (.25" or so) larger to accomodate for better flow?


ERIC

well, it depends on what you are doing.

Most N/A J's can benefit more from a 2.25" mandrel bent exhaust, even the radical N/A's, but if you are going boosted, a 2.5, or even a 3" is going to be the best size for you.

okay, well...no money for boost, so maybe 2.25"? lol. thanks for the advice


ERIC

yeah, 2.25" will give you the best bang out of an NA car.