A 426 Hemi has basically no power compared to a 572 Hemi. A 572 flat tappet single 4 barrel makes 800 horsepower. Thats over 100 HP more than a Pro Stock Hemi made in 1970 with 2 Dominators on a tunnel ram with a roller cam. The 572 shifts at 6500 RPM's and lives forever. The old Pro Stock 426 lives a few months until the pressures of high rpm's and stiff valve train blow up.

2011 Drag Pak Challenger