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Old 01-07-2006, 22:16   #1 (permalink)
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exhaust size

ive just brought extractors for my carby 4.1 xflow xf ute,
they come out to a 2 inch outlet ..
can any one please recomend the correct or best exhaust size to run
any comments would be most appreciated
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Old 01-07-2006, 23:18   #2 (permalink)
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Re: exhaust size

get a redback 21/2" exhaust.
Any bigger and you'll lose back presure,
which causes loss of h.p.

I think there on ebay.
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Old 01-08-2006, 19:40   #3 (permalink)
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Re: exhaust size

Well those extractors should be modified or taken bad because they have been designed crap. A single 2" outlet is laughable good for a excel etc.. You want twin 2" secondaries the longer the better that run into a nice collector and then single 2.5" system with s/through muffler. You can use a 2.25" system on a 250 but it would only be useful if you always were under 3000rpm etc. otherwise I'd go 2.5".
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Old 01-09-2006, 03:00   #4 (permalink)
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Re: exhaust size

hey
losing backpressure will not decrease hp but will affect torque.
id use a 2.5 but cheap simple plentiful
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Old 01-09-2006, 14:59   #5 (permalink)
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Re: exhaust size

cheers guys , ive jus brought a 2 1/2 inch system
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Old 01-11-2006, 19:54   #6 (permalink)
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Re: exhaust size

yea it depends what you are going to run if you are going to run true-duel
dont waste your time or money it will only sound like shit of a stock or near stock 300 i run a single pipe 2.5" with a hushpower2 muffler and a nice big tip you gety sound and power if thats what you want
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