Also the GXP G8 is an 09 not an 08. It was a 415 horse/torque LS3 where the GTO only had a 400 horse LS2 in 05 and 06, but only had a 350 horse LS1 in 04. The Chevy SS and G8 are both based on the Aussie Holden Commodore. The Chevy SS is just a rebadged GXP G8 with worse looking body panels and no manual option.
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