Howards Cams Pro Max RPM Hydraulic Roller Lifters Designed to operate at RPM ranges over 7000 RPM. All new internal valving for increased RPM, torque, and horsepower. The lifter body is fully machined from alloy steel bar stock. The nose wheel is machined from 8620 material and case hardened for durability. Made in the USA! Sold in sets of 8. Note: Spring pressure requirements for these lifters are 200-225 lbs. seat pressure, 500-575 lbs. open pressure. Specific lash adjustments are also required.
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