Thread: Turbo ?'s
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Old 01-20-2008, 07:53 AM   #10
GP99GT
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the Cartuning Performance turbo kit for the grand prix put down 296hp and over 400tq on a STOCK n/a 3.8, with a T04-B P-trim garret turbo, open downpipe...they also have a PT-61mm upgrade which they say can support 600+hp
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