Description
Part Number: AR8615
ARP Head Stud Kit – Mitsubishi Lancer Evolution X (4B11 / 4B11T)
Engineered to maintain ultimate cylinder head sealing integrity on high-performance Mitsubishi Evo X 4B11 engines under heavy boost.
Key Features
- ☑ Premium 8740 Chromoly Alloy: Heat-treated in-house to deliver a massive 200,000 psi tensile strength capability.
- ☑ Post-Heat-Treat Thread Rolling: Precision J-form threads are rolled after heat treatment for up to 1000% higher fatigue resistance than standard studs.
- ☑ Centerless Ground Precision: Machined through multiple light passes to ensure absolute concentricity and straightness.
- ☑ Prevents Head Gasket Failure: Replaces factory torque-to-yield bolts to eliminate head lift and maintain clamping load under extreme pressure.
- ☑ Motorsport Grade Hardware: Supplied with hardened parallel-ground washers and 12-point nuts for uniform load distribution.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | ARP (Brian Crower PN: AR8615) |
| ARP Part Number | 207-4206 / AR8615 |
| Engine Application | Mitsubishi 4B11 / 4B11T 2.0L Turbo |
| Vehicle Fitment | Mitsubishi Lancer Evolution X (Evo X) |
| Fastener Material | 8740 Chromoly Steel |
| Tensile Strength | 200,000 psi |
| Nut Style | 12-Point Hex Nut |
What’s Included in the Box
- ARP 8740 Chromoly Cylinder Head Studs (Mitsubishi 4B11)
- Parallel-Ground Hardened Steel Washers
- 12-Point Fastener Nuts
- ARP Ultra-Torque Fastener Assembly Lubricant
At JP Racing, we supply genuine ARP components backed by expert technical advice and fast UK dispatch. Engineered for demanding motorsport and high-horsepower road applications, the AR8615 head stud kit provides the ultimate clamping force required for your 4B11 engine build.
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