COMP Cams Evolution Retro-Fit Hydraulic Roller Lifter - 0.842 in in OD - Link Bar - Big Block Chevy (Pair) NPT Plugs Indexing helps prevent premature transmission

Indexing helps prevent premature transmission pilot bearing failure

Proof is evident in the wide spread use of the PolyMatrix family of compounds and several other specialized application materials

842" bores

1955-1963 Arnolt-Bristol Bolide

Features 3/16" mic plug and 3/16" mic jack

COMP Cams Evolution Retro-Fit Hydraulic Roller Lifter - 0.842 in in OD - Link Bar - Big Block Chevy (Pair) NPT Plugs Indexing helps prevent premature transmissionCOMP Cams Evolution HCT (Hydraulic Cartridge Technology) is a new patented tappet. The Evolution HCT tappet provides most consistent performance of any set of lifters in the aftermarket. A combination of self contained hydraulic cartridge and accompanying reduced oil volume that is less effected by oil aeration delivers the most consistent bleed rates between each lifter. The smaller volume within the hydraulic cartridge creates one of the most