This is a BRAND NEW set of Wiseco forged aluminum Pistons for a small block Chevy engine. These are surplus pistons purchased from professional Race Engine builder's shop. These pistons are designed for use with Small Block Chevy racing heads and have sufficient valve pockets to work with most inline valve SBC heads.

Here are the specs on this set of Pistons:

Cylinder Bore: 4.122"

Compression Height: 1.130"

Pin Size: .927"/2.950"

Piston type: Lightweight Forged Aluminum

Options: Lightweight Skirts