High Rpm Pontiac 389 / 400 / 421 / 428 / 455 (May Requires Block Bushings) Hydraulic Roller Lifters With .903 Inch Body And .810 Inch Roller Wheel

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Engine Pro's Top Of The Line High Rpm Series Hydraulic Roller Lifters Are Easily Identified Via The Polished Billet Body, Clipped Axle And Open Wheel Design. These Lifters Have A 7000+ Rpm Capability With .120 Inch Plunger Travel And An 80% Fill Rate With The Test Oil. The High Rpm Hydraulic Series Utilizes A Larger .750 Inch Sized Roller Wheel Within The .842 Inch 875 Inch Diameter Body. The .903 Inch Diameter Body Lifter Utilizes An .810 Inch Sized Roller Wheel With Direct Pressurized Oil To The Needles. Recommended Spring Pressures: Up To 220 Lbs Seat, Up To 650 Lbs Open Pressure

• 7000+ RPM Capability With .120 Inch Plunger Travel
• Internal Tolerances Are Much Tighter In This Series
• Made From A Billet Body And Have A Clipped Axle
• Made In USA
• Recommended Spring Pressure 100-225 Lbs Seat Pressure And 350-550 Lbs Open Pressure

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Information:

Note: All Lifters With A Tie-Bar Are Designed To Be Installed In Either Retro-Fit Engines Or Engines Originally Equipped With Roller Lifters