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  On 18/03/2012 at 8:59 AM, Roy said:

Don't go posting this stuff up on SAU. The real good gear you need to keep quiet and to yourself :) I did an exhaust with a friend years ago when I lived in Sydney and had after hours work to my old employers factory, tools etc. Their gear is top notch and I was planning on using two of their real mufflers in a twin system.

What I need to find is a centre muffler that has a 4" inlet and twin 2.5" outlet

Ha ha ha... I do keep all the 'really good gear' off the forums.

At the end of the day XXXXX will custom make anything you need. Or just buy they're packing materials and custom make your own. I actually have a XXXXX 5" mid muffler with reducers to 4" I was going to use as a 'pre' resonator. I'm now going with twin 3.5" systems.

If you want to branch off into twin 2.5".... I would go:

Large diameter, short (10/12") 4" barrel muffler, 4" to 2x 2.5" collector, twin staggred 2.5" barrel mufflers then twin rear cans of your brand choise.

J.

Edited by XRATED
  On 16/03/2012 at 12:40 AM, dori34 said:

but they allow open screamers, your car must be insanely loud for them to pick it up and kick you off the track.

ok i just checked the wakefield regs, it says max limit is 95dB at 30m,

they must be very lienant with this as ive seen alot of GTRS/V8/cars with open screamers go there without an issue.

95dB at 30m is /loud. That is 115dB at 3m measurement (typical measurement).

  • 4 months later...

Has anyone used the Tomei Expreme Ti cat back before?

Im looking at buying one. but some people ive talked to about them has run them down.

Saying they are actually restrictive compared to other exhausts, its not a true 90mm exhaust etc

And that there are better value exhausts out there for the money.

Any one have any experiance with them?

And is it reali stupidly loud?

Don't know much about the tomie exhausts, but see if you can find a futjitsubo Ti cat back. It might be a viable alternative, although i don't know if they still make them.

Mine was super quite & super light and i couldn't find any restrictive points when i pulled it off the other day. It measured 75-80mm ID.

Edited by wedge_r34gtr

I have both of them the tomei ti and a twin ti , the tomei seems to flow just as well as the twin system but the tomei one is soooo loud :) but that is the reason i got it as the twin system is quite and great flow . I just swap them as i feel need for quite or loud ;)

My tomei cat back arrived last night. and of course its not installed yet but damn it looks like a thing of beauty!!

So well made, beautiful welds etc thing of art!

Will install this weekend

They norm have a 3.5inch pipe that goes into the muffler, but than when u look inside the muffler there's only a 2.5inch pipe inside it. So it creates a restriction, and also they go down to like 3.1-3.2 inch at the flanges. I've also seen the cannons only have like a 2.5-2.8inch pipe inside it.

Just have a good scope around it mate with a camera and tape messure

It is not 90mm whole way deano it does go down to 85 some places from memory and as for inside not to sure but it doesnt seem to go down to much but i didnt measure id of mufflers , just look at mine next time you around :)

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