GM Performance Parts Bowtie Sportsman Block - 350 Main, 4.125" Bore

Bare, cast iron, competition blocks are precisely machined, with four bolt, nodular iron main caps, tall lifter bores and extra smooth gasketsurfaces for superior sealing.

Features:

350 Main, 400 Bore Size Bowtie Sportsman Block

2-Piece Rear Main Seal

CNC-machined cast iron competition block

+/-0. 001 machining tolerances

4-bolt nodular mains, splayed caps on center 3 mains

4. 117 finished bore

4. 155 max bore (siamese cylinder bores)

Extra smooth gasket surfaces for better seal

Tall lifter bores

Pit Stop USA offers GM Performance Parts Bowtie Sportsman Block - 350 Main, 4.125" Bore 12480157 at low everyday prices. Be sure to check out all of our products from GM Performance Parts including GM Performance Parts Cast Iron Engine Blocks - Small Block Chevy.