ARP Head Stud Kit
2013–2016 Scion FR-S, 2017–2020 Toyota 86, 2013–2020 Subaru BRZ 4U-GSE Engine
260-4301
Overview:
The ARP Head Stud Kit for the 4U-GSE engine is a premium upgrade designed specifically for the Scion FR-S (2013–2016), Toyota 86 (2017–2020), and Subaru BRZ (2013–2020). This kit replaces the factory torque-to-yield (TTY) head bolts with high-strength ARP Pro Series studs, delivering enhanced clamping force and durability. Ideal for enthusiasts seeking improved engine reliability and performance, the ARP head studs provide a significant increase in tensile strength, helping to maintain optimal cylinder head sealing under high-stress conditions.
Whether you are upgrading your engine for increased power, preparing for forced induction, or simply aiming to improve long-term durability, this ARP Head Stud Kit offers a reliable solution engineered to meet the demands of performance driving.
Key Features:
Engineered for strength, precision, and reliability, the ARP Head Stud Kit includes:
- 25% greater tensile strength compared to OEM torque-to-yield head bolts
- Manufactured from ARP2000 alloy rated at 220,000 PSI tensile strength
- Centerless ground studs for precise fitment and consistent clamping force
- Heat treated prior to thread rolling and machining to ensure durability
- Includes parallel ground washers for even load distribution
- 8740 chrome-moly steel 12-point nuts for secure fastening
- Comes with ARP Ultra-Torque fastener assembly lubricant for proper installation
- Designed specifically for the 4U-GSE engine found in Scion FR-S, Toyota 86, and Subaru BRZ
Construction & Design:
The ARP Head Stud Kit is crafted from ARP2000, a proprietary alloy known for its exceptional strength and fatigue resistance. Each stud undergoes a rigorous manufacturing process including centerless grinding for dimensional accuracy and heat treatment before thread rolling to maximize tensile strength and durability. The 12-point nuts are made from 8740 chrome-moly steel, providing superior hardness and resistance to wear. Parallel ground washers ensure even load distribution across the cylinder head, reducing the risk of warping or gasket failure. This meticulous engineering results in a fastener kit that outperforms factory components in both strength and longevity.
Installation & Fitment:
The ARP Head Stud Kit is designed as a direct replacement for the factory head bolts on the 4U-GSE engine, requiring no modifications for installation. Installation should be performed by a qualified technician following ARP’s recommended torque specifications and procedures. The included Ultra-Torque lubricant ensures proper torque readings and prevents galling during assembly. This kit is compatible with the following vehicles:
- Scion FR-S (2013–2016)
- Toyota 86 (2017–2020)
- Subaru BRZ (2013–2020)
What's Included:
- 12 ARP2000 head studs
- 12 parallel ground washers
- 12 8740 chrome-moly steel 12-point nuts
- 1/2 oz ARP Ultra-Torque fastener assembly lubricant
Ideal For:
This ARP Head Stud Kit is ideal for performance enthusiasts, tuners, and racers who demand increased engine reliability and strength. It is especially beneficial for those upgrading their 4U-GSE engine with forced induction, higher boost levels, or aggressive tuning where the factory head bolts may be prone to stretching or failure. Additionally, it suits anyone looking to enhance the longevity and sealing integrity of their engine under spirited driving conditions.
