• Using Finite Element Analysis, the convoluted OD is engineered to provide the optimum balance of fatigue strength, weight and stress distribution.
• Holes precisely located through the retainers' cross section introduce oil to the valve spring at the critical inner to outer spring interface, greatly extending valve spring life.
• Finally, the heat treated aerospace grade titanium alloy is surfaced enhanced with Manley's exclusive impingement process. this process eliminates all machining marks, improves fatigue strength and elevates surface hardness, thus reducing wear on both the ID and the spring shelves.
• Due to the larger .031" radius on the corner of the inner step, the ID of each valve spring, specifically the inner spring, must be chamfered prior to installation. It is highly recommended to use Manley's valve spring chamfering tool, P/N 40174 ($69)

Note: ICD Super 7 retainers require use of Super 7 valve locks.