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Old 07-11-2011, 01:20 PM   #2
mlee
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Drives: ZLE & ZR2
Join Date: Oct 2008
Location: Conroe, TX
Posts: 37,958
The 475 is just basic bolt ons... exhaust and CAI. But the 550 includes a supercharger which is def the way to go if you can afford it. Where in TX are you located? We have a couple Hennessey cars in the Houston club...
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