August 5, 200619 yr the new specs show adjusted redlines... 6400 RPM for the 4 6000 RPM for the 9 and the power in the aura is also in the g6's 224 hp and 220 lbft from media.gm the bu has a 217hp & lbft rating the impala and MC didn't get this slightly more powerful engine.... think it's from quanity demand or would they have to get them recertified if they changed the engine?
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