ARP L19-7B High-Performance Head Stud Kit for 4G63 7-Bolt Engines

The ARP L19-7B Head Stud Kit is engineered for high-performance and racing applications on Mitsubishi 4G63 7-bolt engines, including DSM and Evolution 8/9 models. This premium stud kit is specifically designed for engines running in excess of 35 PSI boost where standard head studs cannot provide adequate clamping force.

Key Features:

• Premium L19 alloy steel construction with tensile strength of 260,000 PSI, significantly stronger than standard 8740 chromoly
• Yield strength of 200,000-230,000 PSI for exceptional head gasket sealing under extreme boost conditions
• 11mm (7/16 inch) stud diameter designed for 7-bolt 4G63 engines
• Complete kit includes 10 studs, 10 hardened washers, 10 nuts, and ARP assembly lubricant
• Direct drop-in replacement requiring no modification to cylinder head or block
• Individually wrapped in special wax paper to prevent moisture contamination

Important Handling Notes:

L19 material requires special care to prevent hydrogen embrittlement and stress corrosion. These studs must be kept well-oiled and protected from moisture at all times. Always handle with gloves and store in a dry environment. Recommended for drag racing, short track racing, and high-boost applications exceeding 30 PSI where maximum clamping capability is essential.