T&D Machine Rocker Arm Kit, Shaft Mount, 1.6 Ratio, Full Roller, Aluminum, Natural, AFR 245 Heads, Small Block Chevy

This 2305 rocker set is designed specifically for the AFR 245 NPP head. The .550 offset is typically used with an on center lifter. If a .180 offset lifter is being used you can go with a .450 offset on the intake. T&D always recommends measuring for the amount of offset required for your particular combination.