Manage bottom end stress and flex with three of the strongest billet steel Main Cap Kits available.

350 Small Block Cap Kit Bullet-proof the bottom end with these 4 bolt conversion caps. Precision milled from premium billet material, OLIVER caps feature 10 degree, splayed outer bolt holes that positively reinforce and tie the block webs together. Available with a step for either a 2 or 4 bolt register, early and late style Bowtie blocks or with flat bottoms to fit a milled register. A stock replacement style cap, with straight bolt configuration is offered. 2 and 4 bolt front caps and rear caps for wet and dry sump applications, with either a 1 or 2 piece seal are also available.

Big Block Caps These rugged billet caps are a direct replacement, with straight bolt configuration that precisely fits the stock block registers. Web positions 1 to 4 are available as a set or singly. Rear wet or dry caps are available separately.

400 Small Block Caps This 4 bolt conversion kit comes with 10 degree outer bolt holes and are available with a step or as a flat bottom for the milled register. Front caps and rear wet or dry cap kits provide additional performance options.

Strap Components A budget solution that delivers a high strength bottom end without the installation of a complete kit. Billet support straps are available for both 350 and 400 small block applications and can be ordered as fronts, centers and rear wet or drys.