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RED ZONE Roller Lifters feature the new Marathon Roller Bearing which utilises a larger diameter pin and a shock absorbing thicker outer race for higher fracture toughness! The resulting increased cross sectional area helps prevent premature bearing failures even under the sustained RPM red line abuse of professional endurance racing. In drag racing, Marathon Bearings withstand higher (up to 1/2 ton) spring loads, delivering over twice the number of runs between rebuilds! Exclusive Full Spectrum 3 Point Oiling System features continuous dual action pressurised lubrication at all times to the roller bearings and an extra shot of oil over the nose of the cam where loads are greatest. Helps prevent premature needle-roller wear.