Description
ARP Ford Coyote 5.0L 12mm Head Stud Kit
High-strength 8740 chromoly head stud kit engineered specifically for 2011-2012 Ford 5.0L Coyote V8 engines.
Product Overview
The ARP AR8641 (cross-referenced as ARP 256-4702) head stud kit provides superior clamping force for early 2011-2012 Ford Coyote 5.0L V8 engines. Manufactured from premium 8740 chromoly steel alloy and heat-treated in-house to 200,000 psi tensile strength, these 12mm studs eliminate head bolt stretch and gasket seal failures under heavy boost, high thermal loading, or high-RPM motorsport use.
Key Features
- ☑ Precision manufactured from premium 8740 chromoly steel alloy
- ☑ Heat-treated to 200,000 psi tensile strength for ultimate clamping integrity
- ☑ Centerless ground for perfect concentricity and precise cylinder head alignment
- ☑ J-form threads rolled after heat treatment for up to 1000% higher fatigue resistance
- ☑ Reusable design replacing factory stretch-prone Torque-To-Yield (TTY) bolts
- ☑ Direct fit for 2011-2012 Ford Coyote 5.0L V8 engine blocks (12mm thread spec)
Technical Specifications
| Brand | ARP / Brian Crower |
|---|---|
| MPN / Part Number | AR8641 (ARP 256-4702) |
| Engine Fitment | Ford 5.0L Coyote V8 (2011-2012) |
| Thread Diameter | 12mm |
| Material | 8740 Chromoly Steel |
| Tensile Strength | 200,000 PSI |
| Nut Style | 12-Point Fasteners |
| Finish | Black Oxide |
What’s Included in the Box
- • Full set of ARP 12mm 8740 chromoly head studs
- • Precision 12-point nuts
- • Hardened parallel-ground washers
- • ARP Ultra-Torque Fastener Assembly Lubricant packet
Engineered to demanding motorsport standards, ARP hardware delivers absolute engine reliability for track and street performance builds. Order your ARP AR8641 head stud kit today from JP Racing for expert technical assistance and fast UK delivery.
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