ARP 251-5801 Main Stud Kit for 2005+ Ford 2.5 L B5254 5-Cylinder

Vehicle Fitment

• 2005-present Ford 2.5 L B5254 5-cylinder DOHC engine

Features

• High-strength main stud kit for 4-bolt main cap configuration
• Studs made from 8740 chromoly steel for superior durability
• Designed to eliminate main cap walk and fretting
• Includes hardened parallel-ground washers to ensure even load distribution
• Black oxide finish for corrosion resistance
• Replaces weaker factory bolts for improved clamping force under high torque
• Comes with high-quality nuts for secure fastening
• Re-engineered for increased longevity in performance or high-stress rebuilds

Specifications

• Material: 8740 chrome moly steel
• Main cap configuration: 4-bolt
• Stud finish: Black oxide
• Torque method: Preload with ARP Ultra-Torque lubricant (included)
• Installation: Hand-tighten studs, then torque nuts in multiple steps per ARP sequence

Included Components

• Studs for all main cap locations
• Matching nuts
• Hardened parallel washers
• ARP assembly lubricant
• Installation instruction sheet

Product Description

The ARP 251-5801 Main Stud Kit is engineered specifically for the Ford 2.5 L B5254 5-cylinder engine found in 2005 and newer models. This kit replaces the factory main bolts with high-strength 8740 chromoly studs to significantly increase clamping force, reduce main cap walk, and improve durability in high-performance or rebuilt motors.

During installation, the studs are first installed by hand, followed by step-torquing of the nuts using ARP's recommended lubricant. This process ensures even preload and optimal clamping of the main caps. With proper installation, the ARP 251-5801 kit helps maintain main cap stability, supports high RPM or high-load use, and enhances the longevity of the B5254 engine under demanding conditions.