Enginetech ER411

Enginetech ER411 is a single left-hand stamped-steel rocker arm for selected Buick V6 and V8 engines. The rocker arms operate with Enginetech ERM412 pivot components.

Application / fitment

“Left-hand” describes the rocker-arm geometry and offset, not the left cylinder head or vehicle side. In many engines, ER411 rockers alternate with right-hand ER410 rockers.

• selected 1982–1988 Buick 3.0 L / 181 CID V6 engines
• selected 1978–1979 Buick 3.2 L / 196 CID V6 engines
• selected naturally aspirated and turbo Buick 3.8 L / 231 CID V6 engines, approximately 1975–1989
• selected 1980–1984 Buick 4.1 L / 252 CID V6 engines
• selected 1968–1980 Buick 350 CID / 5.7 L V8 applications in GM and Jeep vehicles
• selected 1970–1974 Buick 455 CID / 7.5 L V8 applications

Do not substitute a right-hand rocker for a left-hand rocker. Compare the offset at the valve and pushrod contact points and install the correct quantity of each version.

Technical information

• type: stock replacement rocker arm, left-hand version
• construction: stamped steel
• roller: no
• related pivot component: Enginetech ERM412
• sales unit: 1 piece

Inspect pushrods, valve tips, pivots and rocker alignment during installation. Incorrect left/right placement can side-load the valve stem.