Jeep Rod Bolt Kit - 4.0L Inline 6

The ARP Jeep Rod Bolt Kit for 4.0L Inline 6 engines delivers the fastener reliability required in high-performance and heavily modified powerplants. This Pro Series connecting rod bolt kit uses ARP2000 alloy material, engineered to withstand extreme loads and cylinder pressure spikes that stock fasteners cannot tolerate. The 16-piece set covers a complete inline-six engine, and the black oxide finish provides corrosion resistance suitable for both street and off-road duty.

ARP2000 chromoly alloy offers superior tensile strength compared to factory bolts, allowing higher clamping loads and more consistent preload retention under thermal cycling and shock loads. Chromoly fasteners are the industry standard for builds involving increased boost, supercharging, turbocharging, or aggressive ignition timing. The black oxide finish resists oxidation in humid conditions and off-road environments where salt spray and moisture exposure is common. Each bolt is precision-manufactured to ARP's specifications and includes the torque values and installation procedures necessary for proper assembly.

This rod bolt kit addresses the needs of Jeep owners building performance variants of the 4.0L inline-six engine—whether for trail recovery systems, off-road competition, or street applications demanding higher output. The complete set eliminates the need to source fasteners individually and ensures all fasteners meet the same quality standard. Owners upgrading to larger displacement, modified camshafts, or enhanced fuel delivery will find this kit an essential foundation for engine durability and reliability. Proper installation with correct torque specifications is critical to realize the full benefit of upgraded fasteners.