ARP BMW 4.0L S65 V8 Custom Age 625 Plus Rod Bolt Kit

When reliability at extreme RPM is non-negotiable, ARP rod bolts are the standard. This Custom Age 625+ rod bolt kit is specifically engineered for the BMW S65 4.0L V8, providing a substantial upgrade over OEM fasteners for high-performance and track-focused builds.

Manufactured from ARP’s proprietary Custom Age 625+ alloy, these rod bolts deliver exceptional tensile strength and fatigue resistance, making them ideal for engines subjected to high cylinder pressures and sustained high-RPM operation. Precision heat-treated and centerless ground, each bolt is produced to exacting tolerances to ensure consistent clamp load and repeatable results during assembly.

Key Features

• Custom Age 625+ Material
  ARP’s strongest rod bolt material, offering significantly higher tensile strength than OEM and ARP2000 fasteners.

• Designed for BMW S65 V8
  Correct length, shank diameter, and thread engagement for direct application in S65 connecting rods.

• Exceptional Fatigue Resistance
  Engineered to withstand the repeated stress cycles associated with high-revving, naturally aspirated engines.

• Precision Manufactured
  Heat-treated, centerless ground, and thread-rolled for maximum strength and dimensional accuracy.

• Improved Clamp Load Consistency
  Helps maintain bearing alignment and rod cap stability under extreme load.

• Includes ARP Assembly Lubricant
  Ensures accurate torque readings and proper fastener preload during installation.

Why Choose ARP 625+ Rod Bolts for the S65?

The S65’s 8,000+ RPM capability places enormous stress on connecting rod fasteners. Upgrading to ARP Custom Age 625+ rod bolts dramatically reduces the risk of fastener stretch or failure, protecting your bottom end in both track and aggressive street applications. For engine builds where reliability and safety margins matter most, this kit is considered a must-have.

An essential upgrade for performance rebuilds, track cars, and any S65 engine pushed beyond factory limits.