Head Bolt Kit 6pt. Jeep 232/258 Inline-6

The ARP Head Bolt Kit 6pt. for Jeep 232/258 Inline-6 engines delivers the clamping force consistency and fatigue resistance required for sustained high-performance operation. Built from chromoly steel and finished in black oxide, this 6-point fastener set replaces factory head bolts with premium hardware engineered to maintain clamp load under thermal cycling and extended duty cycles common to engine rebuilds, turbo conversions, and aggressive off-road applications.

Chromoly construction provides superior yield strength compared to OEM fasteners, preventing bolt stretch and head gasket failure under elevated combustion pressures. The hex head design ensures reliable torque wrench engagement during installation and verification checks. ARP's black oxide coating protects against corrosion while maintaining a clean, low-profile appearance. Proper torque sequence and use of ARP's recommended lubricant (included in most kits) are essential for achieving the design clamping force across all bolt positions in the head.

This kit is engineered specifically for the 232 and 258 cubic inch Jeep inline-6 platforms, which have seen increased demand for reliability upgrades in both stock restorations and modified engine builds. Whether you're rebuilding after higher-than-stock boost levels, replacing corroded factory fasteners, or simply upgrading to professional-grade hardware, the ARP 146-3602 provides the precision and durability expected from a tier-one fastener manufacturer. Proper installation with a calibrated torque wrench and ARP fastener lubricant is critical to achieving rated performance.