Chevy Small Block 6061-T6 Aluminum 1.6 Ratio 3/8" Roller Rocker Arms HEI Tune Up Kits The dual-plane air-gap design combines

The dual-plane air-gap design combines strong low-end torque and excellent street manners with the airflow needed to support mid-range and upper-RPM performance

Hub Type: Keyed Shaft

This kit does not include an adapter for filter mount to hose fitting

or ECM reprogramming

inlet fitting style

Chevy Small Block 6061-T6 Aluminum 1.6 Ratio 3/8" Roller Rocker Arms HEI Tune Up Kits The dual-plane air-gap design combinesSmall Block Chevy 1. 6 Ratio Roller Rocker Arms for Improved Valvetrain Performance These 1. 6 ratio roller rocker arms are designed for Small Block Chevy applications, helping improve valve lift, reduce friction, and support more responsive engine performance. Built from 6061 T6 aluminum, this rocker arm design balances strength, durability, and valvetrain stability for street performance, restoration, and upgraded engine builds. The precision