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Twin Exhaust on NA 6. 

 

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 Post subject: Twin Exhaust on NA 6.
Posted: Wed Sep 12, 2012 1:57 pm 
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Hey guys. Looking at getting twin exhaust on the BA, but the system is made for a turbo.
I've been told I can't run the twin exhaust, as the NA has single outlet cat, turbo has twin outlet.
I'm going to be replacing the Cat with a Venom 400 2.5" or 3" 100cpi Cat.


Will it fit if I have the cat replaced? None the less, I can still have the exhaust shop customize slightly to make it work. Just wanted to know if it will go on with no worries if I had a different cat.

 

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 Post subject: Re: Twin Exhaust on NA 6.
Posted: Wed Sep 12, 2012 3:32 pm 
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Exhaust shop will be able to make it fit easy.

 

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 Post subject: Re: Twin Exhaust on NA 6.
Posted: Wed Sep 12, 2012 5:00 pm 
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Exactly what I thought lol

Just tuffcarparts trying to tell it won't fit at all, and would take a lot of modifying due to the difference in cats...

 

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 Post subject: Re: Twin Exhaust on NA 6.
Posted: Wed Sep 12, 2012 5:31 pm 
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It's not like TCP is going to benefit from not selling you one.
The exhaust shop will do it, but it may not be cheap.

I would've though fitting a turbo cat wouldn't be too hard, or a y-pipe after a normal cat, to match up to the turbo exhaust.

 

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 Post subject: Re: Twin Exhaust on NA 6.
Posted: Wed Sep 12, 2012 5:59 pm 
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TCP is just trying to avoid a possible argument about it in the future. Not say you would, but it happens all the time.

 

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 Post subject: Re: Twin Exhaust on NA 6.
Posted: Wed Sep 12, 2012 6:12 pm 
Getting Side Ways
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It's all good. If there is any mods that need doing to make it fit, they shop will do it.

I just don't think he understood that I was using an aftermarket cat. My initial question was asking whether I would need a 2.5" or 3" cat lol

Guess we'll see how much playing around it needs to fit to the cat once both come in. I'd day say there will be minimal pissing around.

 

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VIXEN FG XT Previous best - 14.431 @ 99.69mph with minor mods
Currently 14.235 @ 101mph same mods. Bring on the 13's!

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 Post subject: Re: Twin Exhaust on NA 6.
Posted: Thu Sep 13, 2012 7:21 am 
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Mekanix and exhaust place people give me the sh&^s sometimes - "I want to know if it CAN be done - not if it SHOULD be done!!".

 

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 Post subject: Re: Twin Exhaust on NA 6.
Posted: Thu Sep 13, 2012 7:50 am 
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Hahaha my exact thoughts at times mate. No sweat off my back though. I'll get it, and then have it modified if need be.

 

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VIXEN FG XT Previous best - 14.431 @ 99.69mph with minor mods
Currently 14.235 @ 101mph same mods. Bring on the 13's!

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 Post subject: Re: Twin Exhaust on NA 6.
Posted: Mon Sep 17, 2012 3:10 pm 
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are you getting a twin 2.25" or twin 2.5"system?
most of the after market systems for XR6T are twin 2.5" which will be overkill for what you need.

 

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 Post subject: Re: Twin Exhaust on NA 6.
Posted: Mon Sep 17, 2012 3:59 pm 
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It might be - ARGUABLY - overkill - but it certainly won't HURT.

When I was 19 I had a 1980 VC SLE 4.2 Commodore. Day before it was booked to have a "sports system" fitted, I cut the pipes off each side under the driver and passenger side floor. The thing F&^%ing FLEW with those pipes cut off!!! (and except for a certain throttle/rev range sounded exquisitely gorgeous and amazingly quiet). The 2.5 single system that then went on it KILLED IT! - and that was straight thru mandrel bent setup with main muffler and hot dog - was F**k loud too actually - I got f*&ked from all directions - because most of the time it was louder than the damned thing was with the pipes just cut off - but without the power!!! Looking back I shoulda raised bloody hell but at the time I just copped it.

I drove my ED for over a decade with a number of different 2.5 inch single systems - any time I tried to ask exhaust places about twin 2.25, twin 2.5 or even twin 2.0 or single 3 inch they grumbled and carried on so much I just dropped it.

I now have a Manta single 3 inch V8 system on my I6 EF AND IT GOES F*&KING GREAT!!! (tho I'm gettin old so it's a tad noisier than I'd like - even tho the note is great) - better than any of the 2.5 systems I ever had on the ED - and I don't need a dyno to prove it - you can FEEL it.

As it is this Manta system was ridiculously expensive for what it is - but with local exhaust shops almost certain to not just give me what I f*&cking asked for it was less hassle to get the Manta thing from Perth and hand it over pretty much ready to fit (just a little cut and weld at the front and hang it) so they had little to argue with. I still copped attitude and a clearly half hearted / half a*** effort as far as the actual fit goes - f*&king thing hangs down too low etc. - and there IS more than enough room for it to be up a good 2 inches more than it is - will have to try again at some stage to have it hung better. Original plan was to use the Manta twin 2.5 rear section with custom 3 inch forward section but that was just TOO ridiculously expensive and would have required more effort from any exhaust shop I took it to.

So as far as I'm concerned there is no such thing as too big - IMO as long as there's a manifold or extractors then that right there is all the "backpressure" - or out of port momentum run that the engine will ever need - ideal from that is straight to atmosphere from the cat - but pipework is a practical necessity - so the bigger the system the better - AMEN! PERIOD! END OF STORY!

AND THAT'S FROM F&^KING EXPERIENCE - NOT ARMCHAIR THEORISING...

So TheKrazeD - for my money you just knock yerself out and more power to ya man!!

I'll aslo point out that a VERY COMMON mod made to Troopies and Patrols etc. amongst the offroad fraternity IS 3 INCH EXHAUST!!

 

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 Post subject: Re: Twin Exhaust on NA 6.
Posted: Mon Sep 17, 2012 4:26 pm 
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dual 2.5" is way too big, not to mention the extra 15kg of redundant weight...

single 3" system will be the way to go

 

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 Post subject: Re: Twin Exhaust on NA 6.
Posted: Mon Sep 17, 2012 5:15 pm 
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I've heard 3" systems and I really dislike the sound. They drone at highway speeds and who cares about 15kg? I've been in a falcon that's had a twin 2.5" and holy f**k it sounded nice. Wasn't overly loud, but the note was just pure bliss for a 6.

Overkill? I'm camming and hopefully getting the compression bumped up a little. I'm just trying to future proof without having to redo it all afterwards.

Besides, my cat converter has collapsed (rattling when I give it a bang), so it's coming off. I might as well take the old single 2.5" system off and get something a lot better flowing.

 

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VIXEN FG XT Previous best - 14.431 @ 99.69mph with minor mods
Currently 14.235 @ 101mph same mods. Bring on the 13's!

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 Post subject: Re: Twin Exhaust on NA 6.
Posted: Mon Sep 17, 2012 6:21 pm 
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I reckon the twin 2.5 will be sweet 8-)

You're pretty much right about the 3 inch not sounding particularly great - mine has settled down a lot with a J3 - altho it's never droned, it used to tend to boom and sound overly hollow particularly on light acceleration and I was ready to just chuck a berklee 2.5 back on it, but with the J3 it's lost pretty much all the boom and it's character has changed to more of a deep rumble than hollow boom. I want to put an Aerochamber on it in place of the straight thru perforated pipe type muffler - having a chamber type thing in there should give me back a crisper note again and quiet it a fair bit - and nothing compares to a large chamber for generating deliciously gorgeous deceleration burble!

I've got a Galaxy S3 which seems to make very decent recordings - might try and put a clip or two up on Youtube.

 

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 Post subject: Re: Twin Exhaust on NA 6.
Posted: Mon Sep 17, 2012 6:59 pm 
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I'd love to hear it :P

 

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VIXEN FG XT Previous best - 14.431 @ 99.69mph with minor mods
Currently 14.235 @ 101mph same mods. Bring on the 13's!

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 Post subject: Re: Twin Exhaust on NA 6.
Posted: Tue Sep 18, 2012 4:21 pm 
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Not having any luck uploading to youtube :-(

 

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