Description
Part Number: AR8655
ARP Head Stud Kit for Hyundai 2.0L G4KF Theta Engine
High-performance cylinder head fastening solution engineered from premium 8740 chromoly alloy to eliminate head lift and head gasket failure in turbocharged applications.
Key Features
- ☑ Manufactured from premium grade 8740 chromoly steel heat-treated to 200,000 PSI tensile strength
- ☑ Precision J-form threads rolled post heat-treatment for up to 1000% superior fatigue resistance
- ☑ Centerless ground to absolute concentricity ensuring uniform clamping force across the head gasket
- ☑ Fully reusable design replacing factory torque-to-yield single-use head bolts
- ☑ Complete kit includes precision 12-point nuts and hardened parallel-ground washers
Technical Specifications
| Brand | ARP / Brian Crower |
|---|---|
| MPN | AR8655 (ARP # 228-4301) |
| Engine Application | Hyundai 2.0L G4KF Theta Turbo |
| Material Grade | 8740 Chromoly Steel Alloy |
| Tensile Strength | 200,000 PSI |
| Thread Process | Precision J-Form Threads (Rolled After Heat Treat) |
| Nut Style | 12-Point Nuts |
What’s Included in the Box
- Full Set of ARP 8740 Chromoly Cylinder Head Studs
- Precision 12-Point Fastening Nuts
- Hardened Parallel-Ground Washers
- ARP Ultra-Torque Fastener Assembly Lubricant Pack
As the UK’s leading high-performance motorsport supplier, JP Racing provides official ARP hardware with comprehensive technical assistance and fast UK dispatch to back your Hyundai G4KF engine build.




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