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Zzp downpipe again.

adidasdude1061

adidasdude1061

New member
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?
 
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?
:th_scratchhead:
 
adidasdude1061 said:
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?
:th_scratchhead:
Click to expand...
As long as you have the stock mufflers and resonator you shouldn't have to worry about any drone.
 


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.
 
adidasdude1061 said:
Next q then, How do you get rid of the resonator? Resonator is just the sound reducer right?
Click to expand...

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.
 


Re: Zzp downpipe again. Plus Exhaust/mufflers

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