The Ultimate Exhaust Sound Level Thread

[sympozium7]

well just had my R33 Gtst EPA test done and completed. 3 inch all the way with stock twin tip muffler at the end, 85Db. A very big difference from the 99Db Xforce that was on before.. Very suprised that it passed, every mechanic i went to before it was tested said that "no way would it pass with just a stock muffler bolted onto the pipe." Just be carefull of mechanics trying to rip you off.. at least round the Epping area anyways...

Big thanks to the guys at U.S Exhausts in Thomastown, Vic. for the custom work on the exhaust and helping out when no one else would.

Now just need to find a decent twin tip muffler to replace the stock one..

Edited September 14, 2010 by sympozium7

[R31Nismoid]

Why not just get two mufflers installed to start?

Then you'd also have a EPA test (which you paid for) confirming your car was then 100% legal.

Giving you then every right to contest the next EPA notice in court

[Guest]

What are peoples opinions on the varex exhausts? Do they pass EPA? If so i'll probably get one on my 33 GTR.

[TiTAN]

anything that can be user adjustable is a no go.

[R31Nismoid]

^ yep - they are adjustable - therefore illegal.

[Guest]

So is having a mega loud exhaust lol. I guess a pro of them is that if it was silenced a bit then you might avoid getting the EPA in the first place.

[R31Nismoid]

Umm... no. Because you have to drive soooo sedately, yes they are THAT restrictive when closed, that you'll end up having it open all the time

[TiTAN]

just throw a big muffler on the back, if its close enough to legal and you arent being a complete douche most cops arent going to waste their time.

[Guest]

Lol yeah I'll probs get a whole new system in the near future- or a decent muffler. It's loud as he'll at the moment- actually got to the "annoying" stage for me and everyone around me. Cheers!

[butch]

on my rb30det im running vband from turbo down with an external gate. 3 inch to cat and 3 inch through to muffler. i've been reading for months but never actually found anyone or been given clear indication of them beating the dba with aftermarket exhausts. Loacted in Nsw

can someone please shed some light with me .

car : 1993 gts with rb30det

exhaust. JJR catcback system , catco 3 way cat (justjap) . custom 3 inch front piping

i cant make sense with comlaw and adrs which state . what category my car falls under , eg. maximum db for my car is **Db to be tested at idle and up to 4800 rpm and back down while remaining under limit