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Mast Motorsports Ls7 Crate Motor Hypereutectic Pistons
Mast Motorsports Ls7 Crate Motor Hypereutectic Pistons
For all it does well, one of the stock LS7's few quirks is its hypereutectic pistons. Mast steps it up a notch with forged Mahle slugs and matches them up with Callies/Compstar 6.125-inch steel H-beam rods. The pistons feature Mahle's Grafal coating on the skirt surfaces, which reduces friction and increases scuffing resistance. It also allows for running a tighter piston-to-wall clearance for reduced blow-by and piston slap. With -3cc valve reliefs, the pistons yield an 11.7:1 compression ratio. View Related Article
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