Best cat-less downpipe?

[VejGTP]

Hey guys! My cat recently got all messed up. I need to either replace it or remove it, so I've decided to look for a cat-less downpipe to replace my current dp.

If anyone could give me a few pointers on what I should buy, I would really appreciate it! Also, would I need to do any PCM reprogramming with just a CAI and Downpipe replacement?

Sorry for the amateur questions, but hopefully someone can help me out.

Thanks!

[Bio248]

ZZP sells pretty nice units. hogan performance is also an option.

you will need a PCM to delete/turn off the SES light that will be set from having no cat on the car.

[VejGTP]

Well I've had my "check-engine" light on every since my cat messed up, so I'm kind of used to it now lol

[VejGTP]

ZZPerformance - ZZP Downpipes #ZZ-GPDP

I assume the 3" Aluminized bolt-in offroad is what I'm looking for? I have a 04 GTP with stock exhaust.

[wa04compg]

ZZPerformance - ZZP Downpipes #ZZ-GPDP

I assume the 3" Aluminized bolt-in offroad is what I'm looking for? I have a 04 GTP with stock exhaust.

I have the 3" Alum bolt in offroad from zzp and I am very pleased with it great quality good fitment...I deff recommend! With stock mufflers and resonator delete has a good throaty tone

[Compg4me]

I have the 3" Alum bolt in offroad from zzp and I am very pleased with it great quality good fitment...I deff recommend! With stock mufflers and resonator delete has a good throaty tone

Does that pipe keep the rear o2 sensor?

[wa04compg]

Does that pipe keep the rear o2 sensor?

If you request the bung when you order yes...I am running rear o2 sensor

[mechguy]

This is also a great time to consider headers.

[wa04compg]

This is also a great time to consider headers.

Yes if you are willing to install headers pay for nice ones or deal with cheapers headers is deff a option since most all of them come with a dp...I think at least

[rynoman03]

Hogan Performance

Go to products and look at downpipes.

[VejGTP]

Headers are nice, but wouldn't I need to get a reprogrammed PCM with headers to get the full performance from them? Or does that become more important when doing things like smaller pulley?

I figured a downpipe would be an easier, less-hassle way to fix my cat problem. Since I wanted to get rid of it anyway.

[SgtMarshal]

there is a place downtown here that will ceramic coat whatever, would I get any gains from ceramic coating the downpipe?

[SlowNA06]

No.