Chevy BBC 454 OEM 4 Bolt Replacement Billet Steel Main Caps

Brand:	Speedmaster
Part Number:	PCE289.1005
Part Type:	Main Cap
Main Cap Position:	4-center
Main Cap Fastener Style:	Straight
Main Cap Fastener Quantity:	4-bolt
Main Journal Type:	Large journal
Main Cap Fasteners Included:	No
Main Cap Material:	Billet steel
Machine Work Required:	Yes
Quantity:	Sold as a set of 4.
Notes:	Replacement for factory 4-bolt blocks.

Speedmaster billet main caps are precision CNC-machined from superior-quality 1025 billet steel. They come available as stock replacements (straight bolt) or with splayed outer bolt holes. The splayed caps feature 10 degree angled outer holes to positively reinforce and tie the block together. These extreme main cap sets consist of the center four caps. Speedmaster billet main caps improve reliability in highly stressed engines by reducing distortion of the main bearing bores, and increasing the cap's resistance to closing up under high loads.