Crower 68135-16 Features:

Crower valve springs for 604 crate engines, set of 16 single springs 1.355 in. OD with a 380 lb/in spring rate for valvetrain control 1.155 in. coil bind specification for compatible crate motor setups Fits Small Block Chevy and 604 crate engine applications

Valve Springs 1.355 Crate 380 Lb/In. Spring Rate, 1.155 Features:

• Single-spring design for 604 crate engines and Small Block Chevy applications, supporting consistent valvetrain control under performance use
• 1.355 in. outer diameter for proper fitment in compatible crate motor and SBC cylinder head setups during replacement or rebuild work
• 380 lb/in spring rate helps maintain valve motion stability and reduce float at elevated rpm conditions
• 1.155 in. coil bind specification supports precise installed-height planning and valvetrain clearance checks
• Set of 16 replacement valve springs for complete engine servicing on 604 crate motor applications and valvetrain refreshes