Crower 66219X903-2 Features:

Pair of Severe-Duty mechanical roller lifters, Crower 66219X903-2 for Ford 370-429-460 engines with Z-bar configuration. 0.903 in. OD body with 1.590 in. seat height; -2 suffix indicates a pair, not a full set of 16 lifters. One-piece CNC-machined body from special heat-treated alloy for full-race valvetrain stability and rigidity. Larger-diameter needle bearings with thicker walls help support high-RPM use and 1000-1300 lb valve spring pressures.

Severe Duty Rollers BBC C .903 In. Od Z-bar Features:

• Pair of severe-duty mechanical roller lifters for Ford 370-429-460 Z-bar applications, .903 in. OD cutaway body
• 1-piece CNC-machined heat-treated alloy body, 1.590 in. seat height, race-ready valvetrain stability
• Large-diameter thick-wall needle bearings for high-rpm rigidity, reduced deflection, and extended bearing life
• Handles 1000-1300 lb valve spring pressure in full-race use, built for extreme cam and valvetrain loads
• No oil restrictors recommended for proper bearing lubrication, optimized for severe-duty racing durability