COMP Cams High Energy Nitride Steel OEM / Long Slot Rocker Arm - 3/8 in Stud Mount - 1.60 Ratio - Small Block Chevy (Set of 16) 2110017 and the TF20 is certified

and the TF20 is certified compliant to the SFI 3

1-1/4 in ID Hose

Just un-snap it and you have easy access to the bolts

4 L Engine

1970-1971 Plymouth Duster

COMP Cams High Energy Nitride Steel OEM / Long Slot Rocker Arm - 3/8 in Stud Mount - 1.60 Ratio - Small Block Chevy (Set of 16) 2110017 and the TF20 is certifiedThese Nitrided COMP Cams High Energy Steel Stud Mount Rocker Arms designed for Chevy V8 265 400 applications feature a 3 8" stud diameter and 1. 6 ratio. High Energy Rockers help eliminate the noise and slop associated with older worn and high mileage stock rocker arms. With a long slot for higher than stock lift camshafts, these rocker arms are an excellent replacement choice for engine rebuilds. Product Description: Rocker Arm High Energy 3 8 in