SKU: 260-4704 | UPC: 672036040444
ARP Subaru EJ Series DOHC Custom Age 625+ Head Stud Kit 260-4704 (1998-2012 Forester Impreza Legacy Outback)
ARP 260-4704 head stud kit upgrades Subaru EJ20 EJ25 DOHC engines with high-strength fasteners that maintain clamp load under extreme boost and heat. Designed for 1998-2012 Subaru Forester XT WRX Legacy GT Outback Baja Turbo models this kit prevents head gasket failures in street track and race applications. Engineered for precise torque and durability in performance builds.
Key Features
- ARP Custom Age 625+ Alloy: Delivers 260000 psi tensile strength for sustained clamping force in boosted EJ engines
- Stud Design: Minimizes thread wear on aluminum blocks while enabling accurate repeatable torquing
- Precision-Rolled Threads: Ensures maximum thread engagement and consistent preload over multiple heat cycles
- Matched Hardened Washers: Includes 12-point nuts and parallel ground washers for even load distribution
- Proven Track Record: Used in NHRA SCCA and Subaru rally programs for reliability at 40+ psi boost
Product Notes
- Kit contains 10 studs 10 nuts 10 washers for complete cylinder head installation
- Lubricate with ARP Ultra-Torque for accurate torque values up to 75 ft-lbs
- Ships in protective ARP packaging weighs 2.1 lbs measures 7 x 6 x 1.5 inches
Installation Notes
- Professional installation recommended.
- Clean cylinder block threads with tap chase ARP lube on studs and Ultra-Torque on nuts
- Torque in 3 steps per ARP sequence re-torque after 500 miles or first heat cycle
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2004-2006 | Subaru | Baja | Turbo |
| 1998 | Subaru | Forester | Base |
| 1998 | Subaru | Forester | L |
| 1998 | Subaru | Forester | S |
| 2008 | Subaru | Forester | Sports 2.5 XT |
| 2004-2005 | Subaru | Forester | XT |
| 2005 | Subaru | Forester | XT Premium |
| 2006-2010 | Subaru | Forester | XT Limited |
| 2009 | Subaru | Forester | XT |
| 2010-2012 | Subaru | Forester | XT Premium |
| 2011-2012 | Subaru | Forester | XT Touring |
| 2005-2006 | Subaru | Outback | XT |
| 2005-2009 | Subaru | Outback | XT Limited |
| 2005 | Subaru | Legacy | GT |
| 1999 | Subaru | Legacy | GT |
| 2005-2006 | Subaru | Legacy | GT |
| 2005 | Subaru | Legacy | GT Limited |
| 2006-2009 | Subaru | Legacy | GT spec.B |
| 2007-2009 | Subaru | Legacy | GT Limited |
| 1999 | Subaru | Legacy | Limited 30th Anniversary |
| 1999 | Subaru | Legacy | Outback |
| 1999 | Subaru | Legacy | Outback Limited |
| 1999 | Subaru | Legacy | SUS 30th Anniversary |
| 1998 | Subaru | Impreza | RS |
| 2002-2005 | Subaru | Impreza | WRX |
| 2010-2011 | Subaru | Legacy | 2.5GT |
Why Choose ARP?
- ARP fasteners power Top Fuel dragsters and Formula 1 engines worldwide
- Custom Age 625+ alloy resists fatigue 5X longer than stock bolts
- CNC-machined in California with lifetime defect warranty
Frequently Asked Questions
- Q: Does this fit 2004-2005 Subaru Impreza WRX EJ255?
A: Yes ARP 260-4704 bolts directly to EJ20 EJ25 DOHC blocks in 2002-2005 WRX and 2004-2009 Forester XT with no modifications - Q: What material are the studs made from?
A: ARP proprietary Custom Age 625+ Inconel-based alloy with 260K psi strength black oxide finish for corrosion resistance - Q: What is the ARP warranty and torque spec?
A: Lifetime warranty against defects. Torque to 65-75 ft-lbs in stages with ARP Ultra-Torque follow EJ head bolt sequence
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock – ships same or next business day
- Packaging: ARP branded box 7 x 6 x 1.5 inches
- Weight: 2.1 lbs
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