Universal Compatibility:Single Springs: Supports stock, 22lbs, and 26lbs springs .Dual Springs: fit for 32lbs and 36lbs setups . Requires 5mm stainless steel valves (e.g., R-35/R-36/R-37) for dual springs.
Compatible engine: fitment for Predator Non Hemi 212cc, for Tillotson 212R/225R/RS (standard 5mm valve). Note：Double spring dedicated: RX2725 Tillotson 212/225 Head (requires matching R-35/R-36/R)
Made with upgraded aluminum precision CNC machining, it combines unparalleled strength to weight ratio and wear resistance of hard anodized coating, complemented by bright colors for surface treatment, designed specifically for high-speed racing engines.
Valvetrain Optimization: Reduces reciprocating mass for faster valve response and improved engine stability.
Complete Kit: Includes 5mm valve keepers/locks. Note: Dual springs cannot be used with stock valves; upgrade to recommended valves for safe operation.