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changing exhaust from dual to single

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Old 03-03-2009, 08:28 AM
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Default changing exhaust from dual to single

hi guys! ill be changing my twin ASM 60mm exhaust to a j's racing 70rr exhaust. im wondering how much power will i gain with the exhaust swap???


my current set up is

j's racing header
j's racing tsuchinoko intake
greddy emu
greddy oilcooler
berk testpipe

i just want to get an idea before i do it.... thanks!!
Old 03-03-2009, 11:11 AM
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I would guess minimal
Old 03-03-2009, 11:21 AM
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5-6 hp maybe more
Old 03-03-2009, 01:04 PM
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i gained 5-7 everywhere going from invidia dual to 70mm greddy single

search for my thread in this section for dyno charts
Old 03-03-2009, 01:12 PM
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The biggest gain that I remember people getting is the weight loss after changing from a dual to a single. someone correct me if i'm wrong!
Old 03-03-2009, 01:15 PM
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Thats right^
Iwould be shocked if you got 10..
but it will look better IMO
It will be lighter and it should make more power
Old 03-03-2009, 03:02 PM
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I would think you would pick up 10 or so whp. Going from a 60mm dual to a 70mm single. Should be decent and let your other mods shine more.
Old 03-03-2009, 06:27 PM
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thanks! i feel like the 60mm is too small for my current set up it feels like when the engine is on 7k rpm - 9k rpm that the muffler is going to explode. my ASM is a streettype silent exhaust. i hope i could gain up to 5-7whp
Old 03-03-2009, 06:33 PM
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not worth the money in my opinion
Old 03-03-2009, 07:20 PM
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i want to maximize the power of the f20c before changing internal parts. so its ok for me to pen a bit of money.


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