Crower 74166F Features:

Crower 74166F shaft rockers fit Pontiac 18° #10093391 heads with 5/8 shafts. Arm length is 1.480 with .550 intake offset and .100 exhaust offset. Stand ID is 021F and uses stand part number 74400X021F for proper setup. CNC precision-machined ball-race alloy steel construction is double heat-treated.

Shaft Rockers Pontiac 18 18° 10093391 Head, 5/8 Shafts, Features:

• Fits Pontiac 18° #10093391 heads with 5/8 shafts for specialized valvetrain geometry in high-rpm racing applications
• 1.480 arm length with .550 intake offset and .100 exhaust offset for precise rocker alignment and optimized motion
• CNC precision-machined ball race alloy steel construction with double heat-treatment for strength under extreme valvetrain loads
• Stand ID 021F compatibility with stand part # 74400X021F for correct shaft-mount installation and component matching
• Optional needle-bearing roller tip upgrade helps reduce friction, increase horsepower, and minimize valve guide wear