TODA Racing offers both Upgraded Valves Springs, as well as complete Inner Shim-Kits for Toyota engines. These kits are recommend when using high lift, long duration camshafts. They will prevent engine damage and power loss due to valve float.
Inner-shim KIT removes weight from the moving parts of the valve train reduces inertia and friction allowing the engine to rev higher. These kits are required for TODA camshafts with lift above 9.0mm.
TODA valve springs have remodeled natural frequency and improved valve spring material. These progressive pitch coil springs have been redesigned to produce high valve lifts safely.