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T&D Machine LS7 Shaft Rocker Arm Kit 1.80/1.80 Ratio BR40072 14000 BTUDerale has been theProduct Description: Rocker Arm Shaft Mount 1. 80 Ratio Full Roller Aluminum Natural GM LS Series LS7 T&D manufactures rocker arm systems for over 400 cylinder heads and its products have established a reputation for the highest levels of quality, performance and long term reliability. The company works closely with leading engine builders to maintain its position at the forefront of technology. Add to this the fact that unlike some competitors each