These tappets have undergone extensive development to increase load, lubrication, hydraulic and life capacities Billet body Increased roller width Roller perpendicularity held to .0002" Hand-honed hydraulic unit cavity Dynamic load capacities increased over 30% Lubrication capacities for hydraulic unit and valve train (top end) increased 10% Lubrication capacities for the roller, cams and cam bearings have increased 100% for increased cooling Made in the U.S.A.. TAPPET PGII +.005 99-17TC
