ARP Ford Cosworth Sierra/Escort Pro Rod Bolt Kit

This ARP performance fastener, stud, bolt, tool, or assembly is the Ford Cosworth Sierra/Escort Pro Rod Bolt Kit. Confirm the exact engine or vehicle application, thread size, length, material, strength series, included quantity, installation lubricant, tightening sequence, and current ARP torque specification before ordering.

Key Features

• 8740 Chromoly Steel: Heat-treated construction resists fatigue and handles loads over 200,000 psi tensile strength.
• Thread Specs: 10mm x 1.25 pitch, 1.890 inch under head length, direct OEM replacement fit.
• Precision Rolled Threads: Centerless ground shank ensures consistent clamp load and stretch measurement.
• Pro Series Wave-Loc Design: Reduces stress risers at thread root for longer fatigue life in turbo engines.
• Ships in official ARP retail box, weight 0.35 lbs.
• 8740 chromoly steel exceeds OEM bolt strength for turbocharged durability.

Fitment

Specifications

What’s Included

One new ARP rod bolt kit in the exact configuration and quantity identified by this listing. Brackets, wiring, air lines, fittings, switches, fasteners, fitting kits, fluids, covers, and accessories are included only when expressly stated for this exact part.

About ARP

Automotive Racing Products manufactures high-performance studs, bolts, nuts, washers, wheel hardware, assembly tools, and installation lubricants for engine, drivetrain, chassis, and racing applications. Thread dimensions, material, preload method, lubricant, torque, and included quantity remain exact-part specific.

Important Disclosures

• California Proposition 65 warning applies. Review the current manufacturer warning before handling or installation.

Related Parts

• Shop all ARP products
• ARP 02-06 Mini Cooper S Rod Bolt Kit
• ARP 03-06 Evo 8/9 4G63 8mm Rod Bolt Kit
• ARP 3/8 inch x 1.6 ARP2000 Rod Bolt Kit

Frequently Asked Questions

How do I confirm the Ford Cosworth Sierra/Escort Pro Rod Bolt Kit fits my application?
Match the exact engine family or vehicle, component location, thread diameter and pitch, under-head length, material, strength series, and every current ARP application note.

Can I reuse the factory torque value with this ARP hardware?
Not automatically. Use ARP’s current instructions for the exact part, material, lubricant, tightening sequence, and preload method. Factory torque values may be based on different hardware and friction.

What is included with this ARP kit?
Only the studs, bolts, nuts, washers, lubricant, and tools expressly listed for this exact part number are included. Verify the required quantity before disassembly.

Installation Instructions

1. Confirm ARP part number 251-6301, the complete application, and every required supporting component before beginning work.
2. Clean and inspect all mating threads and components, then verify thread engagement, length, washers, nuts, lubricant, and required preparation before assembly.
3. Follow ARP’s current tightening sequence, lubricant instructions, torque or stretch method, and any retorque procedure for this exact part.
4. Verify clearance, preload, fastener seating, and normal component operation before returning the vehicle or engine to service.