Secure your Hemi’s bottom end against extreme cylinder pressures and high RPMs. Designed specifically for factory "cracked-cap" style connecting rods, this premium ARP Pro Series rod bolt kit features ultra-high-strength ARP2000 alloy steel rated at 220,000 psi. It is a mandatory upgrade for any high-horsepower, supercharged, turbocharged, or nitrous-fed Gen III Hemi build utilizing stock rods.
When you're pushing the limits of modern Mopar performance, the factory connecting rod bolts become a critical weak link. High Horse Performance recommends upgrading to the ARP Pro Series Rod Bolt Kit (Part #247-6302) to ensure maximum reliability and prevent catastrophic bottom-end failure.
Engineered as a direct, high-strength replacement for standard hardware on OEM connecting rods, these fasteners are constructed from advanced ARP2000 alloy steel. Unlike factory single-use torque-to-yield (TTY) bolts, these premium chromoly fasteners are fully reusable and rated at a massive 220,000 psi tensile strength. This specialized metallurgy provides optimal clamping force and exceptional fatigue life, comfortably managing the violent rotational stress of a built 392 or a heavily boosted 6.2L Hellcat, Redeye, or Demon platform.
Every bolt is heat-treated prior to thread rolling and machining, yielding a fastener with significantly increased fatigue strength compared to cheaper alternatives. Ensure your engine's survival on the track and the street by anchoring your rotating assembly with the names trusted by top engine builders worldwide.
Features & Benefits:
- Premium Metallurgy: Forged from ARP2000 alloy steel to achieve a 220,000 psi tensile strength rating.
- Hemi Fitment: Engineered specifically for factory (OEM) "cracked-cap" style connecting rods across 6.1L, 6.2L (Hellcat/Demon/Trackhawk), and 6.4L (392 Apache) Gen III Hemi engines.
- Superior Clamping: Replaces weak factory torque-to-yield hardware with premium, repeatable, high-tension fasteners.
- Complete Kit: Includes a full engine set of 16 precision-machined rod bolts.
- Made in the USA: Manufactured to exact tolerances at ARP's state-of-the-art facilities.
Product Information:
- Connecting Rod Manufacturer: Stock Cracked-Cap MOPAR Connecting Rods
- Replaces OEM: 06508245AA 6.1L, 06509243AA 6.4L & 06508955AA 6.2L Bolts
- Cap Retention Style: Cap screw
- Rod Bolt Head Style: E
- Rod Bolt Nut Style: 12-point
- Fastener Yield Strength (psi): 220,000 psi
- Connecting Rod Bolt Material: ARP2000 alloy
- Nuts Included: No
- Wrench Diameter: 7/16 in.
- Quantity: Sold as a set of 16.
Technical Specifications & Installation Notes:
- ARP Part Number: 247-6302
- Torque Specification: 65 ft-lbs using ARP Ultra-Torque Fastener Assembly Lubricant.
- Recommended Stretch Target: .0075” to .0080” (Note: Measuring physical bolt stretch is always the preferred and most accurate method of installation).
- Required Lubrication: Use only authorized ARP Ultra-Torque lube on the threads and under the bolt head to guarantee accurate torque values.
⚠️ IMPORTANT MACHINE SHOP NOTICE:
Because ARP2000 fasteners exert vastly superior clamping force compared to stock hardware, installing them can slightly distort the roundness of a factory rod’s big-end journal. For maximum safety and to maintain correct bearing clearances, HHP highly recommends having a professional machine shop check and resize your connecting rods prior to final engine assembly.
Because ARP2000 fasteners exert vastly superior clamping force compared to stock hardware, installing them can slightly distort the roundness of a factory rod’s big-end journal. For maximum safety and to maintain correct bearing clearances, HHP highly recommends having a professional machine shop check and resize your connecting rods prior to final engine assembly.
