ARP Head Stud Kit FA20 FA20DIT (260-4301) | Subaru WRX 2015-2021 / Forester XT 2014-2018 / BRZ 2013-2021 / Scion FR-S 2013-2016 / Toyota GT86 2017-2021

The ARP Head Stud Kit FA20 / FA20DIT (260-4301) is engineered to provide superior clamping force and durability for Subaru FA20 and FA20DIT engines found in WRX, Forester XT, BRZ, and 86/FR-S platforms. Built from high-strength ARP alloy and precision-manufactured to exact tolerances, this head stud kit enhances head gasket sealing integrity under elevated boost, high-RPM, and high-load conditions — making it ideal for performance tuning, forced induction builds, and motorsports use.

KEY FEATURES

• Performance head stud kit engineered specifically for FA20 and FA20DIT Subaru engines
• Premium high-strength alloy studs designed for increased clamping force compared to OEM head bolts
• Precision-manufactured studs, nuts, and washers for consistent fit and performance
• Improved fatigue resistance for boosted, high-power, and competition applications
• Includes hardware required for a complete head stud upgrade

TECHNICAL SPECIFICATIONS

• Part Number: 260-4301
• Fastener Material: High-strength ARP alloy (heat treated for durability and tensile capacity)
• Head Stud Configuration: Studs, nuts, and washers engineered for FA20/FA20DIT cylinder head
• Socket Size: 12-point nut for efficient torque application
• Design Intent: Increase head clamp load and sealing integrity for performance and boosted engines
• Application: Subaru FA20 / FA20DIT engines

VEHICLE FITMENT

• Subaru WRX 2015–2021
• Subaru Forester XT 2014–2018
• Subaru BRZ 2013–2021
• Scion FR-S 2013–2016
• Toyota GT86 2017–2021

PRODUCT NOTES

• This kit includes head studs, nuts, and washers only; related engine fasteners such as rod bolts and main studs are not included.
• Proper installation requires adherence to ARP and OEM torque specifications to achieve intended clamping force.
• Use of ARP assembly lubricant or equivalent is highly recommended during installation for correct bolt stretch and longevity.
• Professional engine assembly practices and torque sequencing are advised for best results.

ARP delivers precision-engineered, high-strength fasteners and hardware solutions trusted by professional builders, racers, and performance enthusiasts worldwide for uncompromising reliability, durability, and repeatable performance in demanding automotive and motorsports applications.