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Typically, a Dart 427 SHP short-block comes with 26cc dished full-floating pistons. That is part of a combo that’s good for 550 hp at 5,700. We are hoping for 600 or a tad more out of this engine build, so Mahle forged flat-tops with eyebrow valve reliefs were selected to raise the compression ratio to 11.2:1. These pistons come with Mahle’s skirt coating for durability and reduced friction.