Quote:
Originally Posted by SpeedIsLife
425-435 is about what stock 392's are making thru the new A8. A CAI and resonator delete yields about 455 whp and 445-455 tq.
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You can find many examples of bone stock C7 auto cars making between 395-415RWHP. You can also find that the engine responds very well to mods. 20-30RWHP gains from a tune or 30-40RWHP gains from a flex fuel E85 tune. 25-35RWHP from LT headers before tuning. DI, VVT and high compression make for some impressive gains with bolt ons.