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S Chassis Technical discussion related to the S Chassis such as the S12, S13, S14, and S15.


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Old 05-24-2011, 07:52 PM   #1
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Jasma exhaust

So I'm running around 350 hp on a s13 sr and I have a older hks high power jasma exhaust. Could this rob hp from me or even cause a problem if I run high boost???
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Old 05-25-2011, 01:02 AM   #2
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JASMA is a certification...if its a JASMA stamped exhaust, its probably restrictive due to the extra buffles to keep them quiet. It could be slightly restricting your power level.
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Old 05-25-2011, 08:21 AM   #3
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Yeah that's what I figured and it does have the stamp on it, it sound cool
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Old 05-25-2011, 01:09 PM   #4
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Which HKS exhaust is it? Does it have a full boxy muffler down the line before the actual muffler on the car? If it is, you can take it to a shop, just have them cut out the pre-muffler and weld a straight pipe on it. Will make it just as good as any other non-jasma mufflers. Well, unless the pipings on it arent for the turbo s-chassis and not 80mm.
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Old 05-25-2011, 01:12 PM   #5
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I would take off the Cat if you have one, Any resonators (meaning any type of muffler looking thing BEFORE the actual rear muffler)

And leave just the muffler tip.

What i did with a my sp
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Old 05-25-2011, 01:15 PM   #6
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It has the resonator on it, no cat and the piping is almost 4inch. I would cut it out but I didn't want to fuck with the exhaust cuz it's pretty cool
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Old 05-25-2011, 03:59 PM   #7
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Then leave it alone if you don't want to fuck with it... Removing the resonator will make it much a louder exhaust.
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Old 05-25-2011, 04:16 PM   #8
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I'm not errors about loud I just want to no if I should buy a new exhaust n sell this one or keep this cuz it's not a problem with the amout of hp I have
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