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Single exit or twin exit custom exhaust and why?

Mr CL7

Mr CL7

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Location
Eltham/Gravesend
Car
2.0 petrol CL7
Question for you folks.

On my 2.0 Accord petrol I've currently got a custom single exit de-cat back sports exhaust setup with a silencer in the middle. It will be removed as I am going back to near standard as possible with the sound and music it currently makes to hardly any noise at all. I was given an option of making my new setup as a twin exit which I've never had before or sticking to the current single exit. Other than visual purposes IMO and a little bit more moola would it affect the performance in anyway compared to a single exit? Your reasons whether for or against would be much appreciated. I'm stuck in between a rock and a hard place at the moment.

Cheers
 
For petrol,will defo bring
some more performance mate. Even on diesel, I'm getting little more torque after twin done too.
 
luckboy16138 said:
For petrol,will defo bring
some more performance mate. Even on diesel, I'm getting little more torque after twin done too.
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Performance is good but not to the extent of increased noise. I'm stuck..
 
I honestly don't see how the twin exit on the Accord really serves any purpose beyond cosmetic. If the engine was a V6 with two separate exhaust manifolds each running their own pipes to the back, then yes. But I think they put the twin outlet on the 2.4 for looks alone.

From what I gather, the twin outlet, when I had my exhaust made required extra engineering, extra work, extra cost and really, it's not doing anything more than a good, well designed single pipe would do.

Does look awesome though! :D
 
IMO any gains from having more flow from twins will be lost by the extra weight. If I change my exhaust I'll be going for a free flowing single. :)
 
Im also looking fo decent exhaust system but i will be going single exit on my 2.4
 
Dual exit is my preference. I just like the look, especially in winter when both pipes are condensating
 
I just noticed this while looking for something else.

Reason for branching into 2 pipes is that it reduces the velocity in the pipe(s). Lower velocity = lower sound

On the K24 the result is that at WOT the sound levels are very quiet considering the air-flow through the engine. I kind of like it this way, a quick car that doesn't boast about it.
 
@Brian - I was actually surprised at how noisy your car was at WOT with VTEC engaged. Don't get me wrong, it was a good noise but the howling was a bit unexpected.

The nicest exhaust sound I ever had on a car of mine was from my 6 cylinder '82 BMW 323i, which had separated twin exhausts. I agree with TypeR's unusual observation about the condensation looking good with twin pipes!
 
Jon_G said:
The nicest exhaust sound I ever had on a car of mine was from my 6 cylinder '82 BMW 323i, which had separated twin exhausts. I agree with TypeR's unusual observation about the condensation looking good with twin pipes!
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Old 6 cylinder BMWs do sound lovely don't they. My uncle had an 83 323i when I was a kid. I loved it. And I too agree that condensation out of twins looks sweet! I've had friends comment that my car looks great from behind on a cold morning :D .
 
Jon_G said:
@Brian - I was actually surprised at how noisy your car was at WOT with VTEC engaged. Don't get me wrong, it was a good noise but the howling was a bit unexpected.
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you might have been confusing the howl from the rear bearings to be an engine noise ?
 
i don't usually drive my cars too hard (Brian probably drove my Accord harder than i did :p), but the v6 makes a good angry growl past 4k rpm with the typhoon.
 
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