ARP

• Nissan RB26DETT: Skyline GT-R (R32), GT-R (R33) and GT-R (R34). RB20DET / RB25DET: Skyline GTS-t (R33) and GT-t (R34).
• Nissan SR20DET: Silvia / 180SX (S13), 200SX (S14) and 200SX (S15). VR38DETT: GT-R (R35). Also VG30DE / VG30DETT for the 300ZX (Z32).
• Toyota 2JZ-GTE / 2JZ-GE: Supra (JZA80), Aristo and Lexus IS300. 3S-GTE: MR2 Turbo (SW20) and Celica GT-Four. G16E-GTS: GR Yaris (2020 to 2024), GR Yaris (2025 on), GR Corolla and Lexus LBX Morizo RR. Also 4A-GE 16V.
• Subaru EJ20 / EJ25 DOHC: WRX STI (GD), STI (GR), STI (GV), STI (VA) and WRX (GD), plus Forester and Liberty GT. FA20: BRZ (ZC6) and Toyota 86 (ZN6).
• Mitsubishi 4G63: Lancer Evolution IV, VII, VIII and IX. 4B11T: Lancer Evolution X (CZ4A).
• Honda K20A: Civic Type R (EP3) and Integra Type R (DC5). F20C: S2000 (AP1 / AP2).
• Ford: Barra 4.0 (Falcon and Territory), 2.3 EcoBoost (Focus RS (LZ)), 5.0 Coyote (Mustang GT (S550)), 2.5 turbo five cylinder (Focus RS (LV)).
• Mazda B6 / BP: MX-5 (NA) and MX-5 (NB). 2.3 MZR: Mazda3 MPS (BL) and Mazda6 MPS (GG).
• VW / Audi 2.0 TFSI EA113: Golf R (Mk6) and Audi S3 (8P). 2.5 TFSI: RS3 (8V Facelift), RS3 (8Y) and TT RS (8S).
• Others: BMW M52 / M54 and S50B30 (M3 (E36)), Hyundai G4KF / G4KH (i30 N) and Suzuki M16A (Swift Sport).

Use the Vehicle Fitment tab on each product to confirm your car.

• Head studs and engine fasteners: head stud kits in 8740 chrome moly, ARP2000 and Custom Age 625+, main stud kits, case bolt kits and rod bolt kits
• Flywheel and drivetrain bolts: flywheel bolt kits and the Volkswagen 02M ring gear bolt kit
• Wheel studs: standard and extended studs for the Civic Type R, WRX, BRZ / 86, Lancer Evolution and Holden
• Engine building tools: the ARP ring compressor for an 86.5mm bore

ARP kits are engine specific. Thread size, stud length and washer design change between engines, and sometimes between versions of the same engine, so order by engine code, not just model name. For example, the Subaru EJ uses different head stud kits for DOHC turbo engines and SOHC non-turbo engines, and some engines have M11 and 7/16in options.

Material affects strength. ARP's 8740 chrome moly is rated around 200,000 psi, ARP2000 around 220,000 psi, and Custom Age 625+ around 260,000 to 280,000 psi for engines running very high boost or compression.

Use ARP's own torque figures and installation sheet for your kit, not factory torque specs. Most listings link ARP's instruction sheet under Technical Specifications. Fitting head studs means removing the head, so plan for a new head gasket at the same time. Installation by a qualified professional is recommended.

Where can I buy ARP head studs in Australia?
Chicane Australia carries ARP head studs, main studs, rod bolts, flywheel bolts and wheel studs and ships Australia-wide from the NSW Central Coast. Search by ARP part number or engine code, or contact our team with your engine code if you are unsure which kit you need.

Which ARP head stud kit suits the Subaru EJ20 and EJ25?
For DOHC turbo EJ20 and EJ25 engines in the WRX, STI, Forester and Liberty GT we list the ARP2000 kit 260-4701 and the Custom Age 625+ kit 260-4704. SOHC non-turbo EJ engines use a different kit, 260-4702.

Which ARP kits suit the Toyota 2JZ-GTE?
We list the 2JZ head stud kit 203-4205, the Custom Age 625+ head stud kit 203-4301, the main stud kit 203-5405 and the rod bolt kit 203-6005, all for the Supra (JZA80), Aristo and Lexus IS300.

Why fit studs instead of factory head bolts?
Many factory head bolts are torque-to-yield and stretch permanently. ARP studs thread into the block by hand and are clamped with nuts, which gives more even, repeatable clamping load and spares the block threads when the head comes off again.

When do I need Custom Age 625+?
Custom Age 625+ suits engines running very high boost or compression, usually dedicated drag or circuit builds. Most street and track builds use 8740 chrome moly or ARP2000.