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Old 01-29-2009, 03:09 PM   #4
Ad Wizard
Risking Life and Limb
 
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Drives: K5 Blazer
Join Date: Oct 2008
Location: Austin
Posts: 23
it's basically a pulley/tune/intake/exhaust package. I did the exact same thing for my '04 Cobra for under $2 grand. But since Hennessey is associated with it, I would guess $25,000

But hey, it comes with premium floor mats!
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