jchangsta2six

iTrader: (1)

its also a good idea to state: what size dia. piping should be used?

a lot of people on here seem to go with 2.25 or 2.5 custom piping ... and yes it will also work for turbos!!!

Blacksheepdj

iTrader: (88)

This is a n00b thread. I don't know if I want to get into the sizing debate...

rhyzin

iTrader: (1)

see this thread to go a lil deeper

https://www.evolutionm.net/forums/sh...hlight=exhaust

EDIT: kinda gets left at a cliffhanger in the end so just take what theory they have and make a decision

clangfor72

iTrader: (1)

very informative, I was wondering where the other cat was. I was always told there were two.

hypnotikk_beatz

So what type of header would you recommend or would be best for my 02 OZ Rally If......
1) I have a magnaflow cat back, and magna flow cat converter?
2) If I am not planning to go turbo, but I do want it louder (louder is better) would I still feel performance if I go 2.5" piping?
3) If I have the Cat and a smog legal header in the state of Schwarzenegger land, do you think I would be legal when it comes time for a smog check?

Louder is better!

PhonyEvo_1

iTrader: (1)

I'm assuming I'm screwed when it comes to smog, and I would need to bolt the stock cat's back on when smog time comes (I'm in Cali), thank god I kept them. I have the KamiKaze header & downpipe, and then MagnaFlow Hi-Flow Cat and MagnaFlow CatBack exhaust. Why does everyone seem to get axle back?

hypnotikk_beatz

Are any of your mods street leagal? If you have that CAT, I don't see why you couldn't pass the smog test. When are you due?

Blacksheepdj

iTrader: (88)

In CALI, you'll fail with pretty much everything. Unless you have CARB stickers to show the officer/smog tester. So you'd wanna go back to stock. And pray you don't get pulled over.

As for "why does everyone seem to get an axleback?", I did because I paid $75 shipped for it. In my experience, most people seem to have catbacks...

PhonyEvo_1

iTrader: (1)

I'm not due for a smog for a while, since my car is a 2003. As for exhaust loudness, my CatBack exhaust and HighFlow Cat were both recently installed, and the sound is pretty loud, almost "ricey". I know that the header and DP contribute to the noise. So if I wanted to tone it down, should I just order a resonator or did my CatBack exhaust come with one and its just not big enough? I've searched thru many threads, never got a clear answer. I know that a silencer has to be custom made and put into the muffler. So would a resonator purchase be the logical & cheap way to go? Sorry I'm slightly confused.. for the first time.

hypnotikk_beatz

Damn, that sounds like a hassle having to change everything every 2 years!
And I am about to get all my toys (headers, cat converter, cat back etc)

PhonyEvo_1

iTrader: (1)

They changed smog regulations recently... at least in Cali. I think its mainly on new cars. My sister has a 2001 Lexus, and still has not smog'd it or received notice to smog. So I'm guessing they increased it to 5 or 6 yrs now. Which I can deal with, good thing is, all the parts that would have to be changed are bolt-on.

Blacksheepdj

iTrader: (88)

Yes, a resonator should help.

PhonyEvo_1

iTrader: (1)

Cool thanks, I think I'm going to purchase a second resonator to get put on. So I think I'm going to buy a 14" MagnaCore resonator, hopefully that'll bring down the sound a little. I was initially thinking about just replacing the existing one on there with a larger one. I think adding a second might be more effective though.

Blacksheepdj

iTrader: (88)

Two is always better for that. 14" should make a difference. Best of luck!

PhonyEvo_1

iTrader: (1)

This could be a stupid question but if before I order it, should I order it to be the same size (opening) as the rest of my exhaust: 2.25", or should I/Can I go with 2.5"?