However, it maintained the SBC's original 4.4-inch cylinder bore spacing, single camshaft, and pushrod valvetrain with two valves per cylinder. Key characteristics of the Gen III LS1 include its ...

It’s a design with the valves on the outside — so instead of the single camshaft you might expect from experience with OHV engines nestling in the V above the camshaft it has two camshafts at ...