Platinum Dual Spring LS Kit Steel Retainer

The Platinum Dual Spring LS Kit Steel Retainer by Brian Tooley Racing is a purpose-built valve spring assembly engineered for serious LS engine builders and performance mechanics who demand reliability under high-RPM conditions. This complete kit addresses one of the most critical failure points in aggressive LS builds: valve spring collapse and retainer failure under extreme lift and duration. Whether you're assembling a track-focused motor, a turbocharged street engine, or a competition platform, this dual-spring design prevents valve float and ensures consistent, predictable cylinder head performance across the entire RPM band.

This kit features a robust 380 lb/in spring rate paired with dual-spring geometry and hardened steel retainers, delivering the clamping force and stability required for aggressive valve events without binding prematurely. The 1.070-inch coil bind specification ensures controlled preload and prevents over-compression, while the 1.300-inch outer diameter fits LS-series cylinder head specifications precisely. Each assembly includes locks, steel retainers, Viton seals, and precision-machined seats—all critical components that work together to manage valve train stress, reduce harmonics, and extend component life. The complete package weighs 4.475 lbs and ships as a ready-to-install kit, eliminating the need for sourcing multiple aftermarket components.

This assembly is ideal for LS engine builders transitioning from stock or entry-level spring packages to high-lift camshaft combinations, supercharged platforms, or naturally aspirated builds exceeding 7,000 RPM. Installation requires basic cylinder head knowledge—experienced engine builders can install the kit in a few hours using standard spring compressor tools. Direct compatibility with all GM LS-series engines (LS1, LS2, LS3, LS7, and derived blocks) makes this a plug-and-play upgrade for both new builds and refreshed heads. Pair this with a quality camshaft and quality fuel system for maximum reliability and consistent power delivery.