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C20Xe - 2 Or 3 Box Exhaust System


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#1 GMC

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Posted 26 October 2011 - 11:16 PM

As most of you are aware, my C20XE conversion is nearing completion, so time to build an exhaust system.

I have 2" Scorpion 3 box system off a GTE I intend to retrofit onto the C20XE. Currently its a 3 box system (back box, centre box and the long skinny front box which sits just behind the down pipe.

What do you guys with a C20XE normally run? I'm thinking the 3 boxes could be restrictive, so considering replacing the front box with a straight pipe? Quite keen to have a nice exhaust note too, but don't want it too noisy.

Whats your thoughts, 2 box or 3?

#2 manta400john

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Posted 27 October 2011 - 06:43 AM

I have a performance front-pipe(GTE) and there is no resonator box in it....I thought all sports systems done away with it ?
What are you doing regards manifold?
John.

#3 spiney_norman

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Posted 27 October 2011 - 08:18 AM

Can't comment on the XE, but my Cav coupe runs a 1.9 CIH with a two box system and sounds lovely. My old Sportshatch (2.0 CIH) only had the centre box the whole time I had it but didn't sound very loud either...

#4 entwistlecymru

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Posted 27 October 2011 - 08:57 AM

The first one I did had a single box you could see right through. That sounded nice but never went as well as it should. Second one I had was a bodged up 2 box system which sounded lovely and went well

#5 GMC

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Posted 27 October 2011 - 11:46 AM

View Postmanta400john, on 27 October 2011 - 06:43 AM, said:

I have a performance front-pipe(GTE) and there is no resonator box in it....I thought all sports systems done away with it ?
What are you doing regards manifold?
John.


Ashley manifold fitted.

Looking at all the replies, 2 box seems to be the way to go!!

:thumbup I'm happy

Edited by GMC, 27 October 2011 - 11:46 AM.


#6 manta88

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Posted 27 October 2011 - 08:35 PM

I have a 2.5" diameter 2 box stainless steel system on my xe and its too noisey for track days 99.8 db at 4500 rpm but passes the MOT ok.

#7 daverwd

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Posted 29 October 2011 - 12:37 PM

running c20xe in my manta ,,, have an ashley manifold and running a stainless steel pipe system from there .. have 2 boxes and sounds great and not overly loud in side the car




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