Endurance Series Mechanical Roller Lifters For Pontiac 400 / 421 / 428 / 455 Engines .903 Inch Body With .810 Inch Roller With Pushrod Cup On Center

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Engine Pro Endurance Series Mechanical Roller Lifters Features A Billet Body With A Pinned Axle And Have 9000 + Rpm Capability. The Axle Diameter Is .470 With Full Time Pressurized Oiling. The Highly Polished Body Has Less Friction And Greater Wear Durability. Special Break-In Lube Between The Axle And Roller Wheel Should Not Be Washed With Solvent Prior To Installation. These Lifters Require A Break-In Period Of 25-30 Minutes Varying The Rpm From 1800-2200 Rpm. Endurance Series Mechanical Lifters Are Recommended For Spring Pressures Of 150- 400 lbs Seat Pressure; 550-1000 lbs Open Pressure.

• Axle Diameter Is .470 Inch With Full Time Pressurized Oiling
• Highly Polished Body For Less Friction And Wear Durability
• Made From A Billet Body With A Pinned Axle And Have 9000 + RPM Capability
• Recommended Spring Pressure150- 400 Lbs Seat Pressure And 550-1000 Lbs Open Pressure
• Requires A Break-In Period Of 25-30 Minutes Varying The RPM From 1800-2200 RPM
• Special Break-In Lube Between The Axle And Roller Wheel Should Not Be Washed With Solvent Prior To Installation

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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