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Old 08-11-2013, 04:40 PM   #10
Truck Norris
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Drives: a Monte Carlo
Join Date: Apr 2011
Location: Sierra Nevada
Posts: 490
I'd go with the C63 due to its bi-turbo V8 which is good for 600whp with just a tune vs the NA 4.0L in the M3 which doesn't have have as much room to grow.
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