Description
Part Number: AR8616
ARP Custom Age 625+ Cylinder Head Stud Kit for Mitsubishi Evo X 4B11T
Engineered for extreme cylinder pressures and high-horsepower 4B11T builds, delivering ultimate clamping force and complete head gasket sealing integrity.
Key Features
- ☑ Custom Age 625+ Super-Alloy: Formulated nickel-chromium material heat-treated to achieve an ultimate tensile strength rating of 280,000 psi.
- ☑ Superior Fatigue Resistance: J-form threads rolled post heat-treatment for up to 1000% higher fatigue life compared to standard pre-threaded studs.
- ☑ Precision Machined & Centerless Ground: Multi-pass centerless grinding guarantees concentricity and balanced clamp load across the entire cylinder head.
- ☑ Reusable High-Performance Hardware: Permanent replacement for factory torque-to-yield (TTY) bolts, enabling repeated re-torquing without stretch degradation.
- ☑ High-Boost & Track Ready: Prevents cylinder head lifting and head gasket failure in high-boost, high-rpm Mitsubishi Lancer Evolution X applications.
Technical Specifications
| Brand | ARP / Brian Crower |
|---|---|
| Manufacturer Part Number | AR8616 (ARP #207-4207) |
| Engine Platform | Mitsubishi 4B11 / 4B11T 2.0L Turbo |
| Vehicle Fitment | Mitsubishi Lancer Evolution X (2008–2015) |
| Material Grade | Custom Age 625+ Nickel-Chromium Super-Alloy |
| Tensile Strength | 280,000 psi |
| Nut Style | 12-Point 7/16″ Nuts |
What’s Included in the Box
- 10x ARP Custom Age 625+ Cylinder Head Studs
- 10x Precision Hardened Parallel-Ground Washers
- 10x ARP 12-Point Fastener Nuts
- 1x ARP Ultra-Torque Fastener Assembly Lubricant (0.5 oz)
Built for extreme motorsport environments, ARP Custom Age 625+ fasteners represent the gold standard in head stud technology for your Mitsubishi Evo X 4B11T engine. At JP Racing, we supply genuine ARP engine hardware with fast UK delivery and expert technical support to keep your performance build on track.
Reviews
There are no reviews yet.