GM LS LSR Cam - 277LRRHR13

The GM LS LSR Cam 277LRRHR13 by COMP CAMS is a hydraulic roller camshaft designed for LS-series engine builds that demand high performance and reliability. This camshaft is ideal for both enthusiasts and professional engine builders looking for a proven upgrade that maintains compatibility with factory-style hydraulic roller lifters while enhancing valve timing and lift characteristics.

Featuring a 277-degree intake duration and a 293-degree exhaust duration on a 113-degree lobe separation angle, this camshaft operates effectively across a 1900–7000 RPM range. It balances low-end torque response with high-rpm capability, and its hydraulic roller design allows for an intake valve lift of 0.614 inches and an exhaust lift of 0.624 inches, promoting superior cylinder head breathing without the need for solid roller conversion or custom valve train modifications.

This camshaft is particularly beneficial for naturally aspirated LS engines, where builders prioritize a plug-and-play installation without extensive modifications. COMP CAMS' precision manufacturing ensures consistent performance across production-tolerance engine blocks, making the 277LRRHR13 a reliable choice for street, strip, and crate engine applications.