Crower 84160X3 Features:

Crower 84160X3 engineered component kit for 1955-1981 Pontiac 287-455 V8 engines with hydraulic valvetrain setup. Includes CamSaver hydraulic lifters 66056X3-16, dual springs 68404-16, retainers 87048-16, and seals 86072-16. Dual springs deliver 116 lb seat pressure at 1.600 in., 302 lb nose pressure at 1.100 in., and 0.910 in. coil bind. Stock O.D. spring design requires no machine work and supports performance applications up to 6500+ rpm.

Kit Pontiac 287-455 Dual Dual Spring Hydraulic Camsaver Lifters Features:

• Matched dual-spring valvetrain kit for 1955-1981 Pontiac 287-455 V8 hydraulic cam applications, optimized package design for classic performance engine builds
• CamSaver hydraulic lifters help promote oiling at the cam lobe interface, supporting smoother hydraulic operation and added protection against excessive lobe wear
• Dual springs rated 116 lb seat pressure at 1.600 in. and 302 lb nose pressure at 1.100 in., built to support high-performance operation to 6500+ rpm
• Stock O.D. spring design requires no machine work on compatible heads, with retainers and valve seals included for a complete matched valvetrain upgrade
• Not compatible with Pontiac heads using 1.65:1 rocker ratio because spring height is too short, critical fitment note for proper installation planning