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DONT do it !! I run a open downpipe it SUCKS.. Its ok at first but for a street car its really annoying.

That being said...mine starts right about even with my serp belt and stops right by the bellhousing. I would say with all the bends maybe 5 foot long???
 

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my hellion DP is 2 or 3 feet

starts about valve cover height and stops right before the k member
 
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