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KPMI Cylinder Stud Kits High-performance cylinder stud kits engineered for durability, precision, and long fatigue life. Ideal for demanding engine builds and heavy-duty applications where strength and reliability matter. Premium material: Manufactured from 8740 alloy steel with a 180,000 psi yield strength for exceptional load capacity. Heat treated & fine grain: Controlled heat treatment and fine-grain structure maximize toughness and wear resistance. Rolled threads after heat treat: Threads are rolled post‑hardening to preserve compressive stresses and extend fatigue life. Interference fit case end: Case end threads designed with slight interference to ensure secure thread contact at high operating temperatures. Precision ground: Centerless ground for concentricity and exact fitment. Protective finish: Finished with premium black oxide for corrosion resistance and a professional appearance. Choose KPMI Cylinder Stud Kits for proven strength, precise fitment, and long-lasting performance in high-temperature, high-stress engine environments.
These High Performance Cylinder studs are made from 180,000 psi yield strength, fine grain, heat treated, premium grade 8740 material
Threads are rolled after heat treating to insure maximum compressive stresses are retained, insuring maximum strength, and the longest fatigue life possible
The case end threads are designed to have a slight interference fit to maintain good thread contact at high temperature
Studs are center less ground to insure concentricity, and finished with a premium black oxide treatment , excellent appearance