Thread: Zzp downpipe again.

Ok one last q for u guys before I buy one of these. Is it worth spending the extra money to get the high flow cat, or is no cat better?

No cat is better [performing] if you do not have an emissions test to pass. Some even say the high flow cat flows worse then the stock cat but i have not seen any data supporting this.

ok, so getting the o2 emulator, and a 304 SS catless 3" bolt-in downpipe is better then running the 304 SS 3" bolt-in downpipe with cat?

no emissions testing in MN, so im guessing catless is the way to go?

Also, How does catless sound with stock exhaust? I don't want to get something that sounds like a cat that stuck in a bag or something... Also anyone know how bad cabin drone is?

Originally Posted by adidasdude1061

Also, How does catless sound with stock exhaust? I don't want to get something that sounds like a cat that stuck in a bag or something... Also anyone know how bad cabin drone is?

As long as you have the stock mufflers and resonator you shouldn't have to worry about any drone.

does the car sound better with the res delete only? Cat delete only? Or still sound good w/ both gone?

without a cat youre going to get a lot of rasp unless you actively combat it with a bigger resonator and stock mufflers.

id keep it if i were you. it smells like you have no cat, so people can tell. it sounds worse without it. your bumper and tips will accumulate soot as well.

Next q then, How do you get rid of the resonator? Resonator is just the sound reducer right?

Originally Posted by adidasdude1061

Next q then, How do you get rid of the resonator? Resonator is just the sound reducer right?

As far as i know yes, you get rid of it by cutting it out and replacing it with straight pipe.

I suggest going on youtube if you are concerned with sound. Type in gtp exhaust note or something to that effect. If you are concerned with performance the best setup i know of is headers, no cat and 2.5" cat back. Borla is most recommended on this site. In your case you would get the 3" downpipe instead of headers.

Originally Posted by adidasdude1061

Next q then, How do you get rid of the resonator? Resonator is just the sound reducer right?

If you are going to get rid of the stock resonator, then I would advise you to put a pretty big glass pack to put in place of it or else you are going to hate the rasp.

ok, then no res or cat delete for me then. I would rather have less loud crap sound, then quiet decent sound, until I can afford some mufflers or exhaust system. What are some good mufflers and tips, other than the Flowmaster 40's?

This thread and this thread should provide you the information you need to make an informed decision.

I am getting the FLowmasters next weekend I think

dont get flowmasters. they are awful. my car drones a lot. im going back to stock mufflers so all i hear is whine.