Isky Red-Zone Max Endurance Roller Lifters 376-180-904

Maximum endurance roller lifters from Isky.
Red-Zone roller lifters feature the Marathon roller bearing that keeps on rolling longer. Marathon bearings utilize a larger diameter pin and a shock-absorbing thicker outer race for higher fracture toughness. The resulting increased cross-sectional area helps to prevent premature bearing failures, even under the sustained-rpm red line abuse of professional endurance racing. In drag racing, Marathon bearings withstand higher (up to 1/2-ton) spring loads, delivering more than twice the number of runs between rebuilds.

Maximum endurance roller lifters from Isky.
Red-Zone roller lifters feature the Marathon roller bearing that keeps on rolling longer. Marathon bearings utilize a larger diameter pin and a shock-absorbing thicker outer race for higher fracture toughness. The resulting increased cross-sectional area helps to prevent premature bearing failures, even under the sustained-rpm red line abuse of professional endurance racing. In drag racing, Marathon bearings withstand higher (up to 1/2-ton) spring loads, delivering more than twice the number of runs between rebuilds. 

(Extra tall version to fit into late bow-tie blocks with raised lifter bosses)