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Old 12-19-2003, 22:20   #1 (permalink)
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Dual exhaust or single-any ideas?

Gday boys and girls, I've just bought an ED V8 wagon. Shes totally stock and have visited a couple of exhaust places to get some quotes on Pacemakers and exhaust. After asking one place about a full twin system, he said it couldn't be done as there isn't enough room under the car. Is this so or can one be fitted, eg. twin 2.25 pipes? I have seen numerous posts of other E series V8 owners who have sedans and yet claim to have a "twin system". I've checked out HM Headers website and the best they do is similar to the factory ie, twin cats into a single piped system.

I'm not being a smart a#@e either, just curious if this is possible.
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Old 12-19-2003, 22:43   #2 (permalink)
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Re: Dual exhaust or single-any ideas?

I believe it is possible and a twin system is good! However, the best power gains are with single systems with the major drawback being more drone...
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Old 12-20-2003, 04:35   #3 (permalink)
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Re: Dual exhaust or single-any ideas?

My mate has a twin 2.5inch system in his EF2 XR8. Seems to be all find and dandy :)
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Old 12-20-2003, 04:50   #4 (permalink)
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Re: Dual exhaust or single-any ideas?

Twin 2 1/2" is a bit tricky to fit, especially going over the diff but can be done, twin 2 1/4" is quite easy though. A single 2 1/2" should give you more power, but as said, if not done correctly can give you a bit of drone.
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Old 12-20-2003, 09:00   #5 (permalink)
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Re: Dual exhaust or single-any ideas?

I am sure duals can fit, if I can get duals under my Volvo...
Depending on engine modifications dual may or may not provide more power. On a relativly stock engine duals with an x-pipe or H-pipe may add a little to the bottom end, but if your engine is modified, especially with cam, intake, heads, then dual exhaust will definity provide a power advantage over a single system.
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Old 12-20-2003, 11:50   #6 (permalink)
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Re: Dual exhaust or single-any ideas?

A twin 2 1/4 system will fit and will provide more power than a single system.

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Old 12-20-2003, 23:08   #7 (permalink)
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Re: Dual exhaust or single-any ideas?

I dunno about power gain but I can tell you a true twin system will sound better than a single system.

Has anyone seriously, with the same car, threw on a twin system then compared it to a single system using dyno, or even better, 1/4mile run times?
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Old 12-20-2003, 23:33   #8 (permalink)
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Re: Dual exhaust or single-any ideas?

Herrod have, and found that a single is better. Which is why now they only really sell single 3" systems to my knowledge.

Aussie Pete can back up my statements I think.
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Old 12-20-2003, 23:35   #9 (permalink)
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Re: Dual exhaust or single-any ideas?

Mainly depends on mufflers..I have single 3" after two hi flo cats 3" S type straight through muffler....Station wagon can go either way. as there fuel tank is diffrent to sedan...
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Old 12-20-2003, 23:45   #10 (permalink)
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Re: Dual exhaust or single-any ideas?

Herrod now have twin systems BUT.... they merge to a single over the diff. I dunno if they do this because it is more cost effective to do so (as they are all mass produced), or because of power gains.

I would like to see dyno charts of true twin vs single on the SAME car. I doubt there would be a lot in it so long as the twin pipes are not too big for the engine.

From experience single gives it that turbo 6 note.... twin will give you the V8 burble. But then again I have heard some very nice windsors with single systems.
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