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race exhaust with out muffler

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Old 02-07-2009, 06:21 PM
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Originally Posted by Js S2k,Feb 7 2009, 06:04 PM
100% 2.75 is 70mm, proven by basically every company out that it makes the most power on our lil 4 banger
well he said its a track car so screw it go loud. i personally wouldnt put anything larger then 63mm on an na car, and i wonder how much more power your really gaining na from 63 to 70.
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Old 02-07-2009, 06:26 PM
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[QUOTE=camuman,Feb 7 2009, 10:21 PM] well he said its a track car so screw it go loud.
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Old 02-07-2009, 07:54 PM
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how about on a stepped style exhaust from 2.5 inch going to 3 inch? i really want to do a 70mm pipe but the problem is we dont have it availabe here in the philippines...
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Old 02-07-2009, 09:11 PM
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^ no one has done it yeat so you my friend will have to do it and come back with results
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Old 02-08-2009, 12:57 AM
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ok! so it will be an R&D thing for me. heheehehee hope it works!
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Old 02-08-2009, 08:04 AM
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Old 02-10-2009, 02:44 AM
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Notice in the article below that Mugen tested a straight pipe from cat back and only gained "several" horsepower. No reason to run w/o a muffler of somekind.

http://www.kingmotorsports.com/techn...?showarticle=2
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Old 02-18-2009, 04:23 AM
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go for it! post some vids.
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Old 02-18-2009, 04:47 AM
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hi monty is that you?? im planin to do this im just waiting for some other parts to arrive for the dyno.
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Old 02-18-2009, 05:06 AM
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Go for it!!! I think it would be B-A!
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