Jeep Rod Bolt Kit - 4.0L Inline 6

The ARP Jeep Rod Bolt Kit for 4.0L Inline 6 engines is designed for serious builders and mechanics who require reliability in high-performance or heavily modified powerplants. This kit addresses a critical weak point in the 4.0L platform: factory rod bolts that can fail under increased horsepower, boost pressure, or sustained high-RPM operation.

Manufactured from premium alloy steel, ARP rod bolts are engineered to tighter tolerances than OEM fasteners, providing superior tensile strength and consistent clamping load across all cylinders. These bolts resist stretch, fatigue, and stress relaxation better than factory hardware, ensuring consistent clamping force throughout thousands of engine cycles and extreme load events.

The ARP 146-6001 kit is specifically designed for the 4.0L Inline 6 bore pattern and thread geometry, ensuring proper fit and preload without modification. Professional rebuilders, Jeep enthusiasts running turbo or supercharger kits, and mechanics servicing high-mileage 4.0L engines choose ARP rod bolts as a preventive upgrade that enhances durability and peace of mind.