SKU: HG-SUEJ25-101.3-1.2T / UPC: 1037721243668
Supertech Copper Ring Head Gasket for 2007+ Subaru EJ25 Engines – 101.3mm Bore, 1.2mm Thick
The Supertech copper ring head gasket, engineered specifically for 2007 and newer Subaru EJ25 engines. This single-side gasket delivers reliable compression retention and leak prevention in demanding turbocharged setups, making it the direct fit solution for enthusiasts building or maintaining high-output Subaru powertrains. With its 101.3mm bore diameter and precise 1.2mm (0.047-inch) thickness, it supports stock to modified configurations where consistent cylinder pressure is essential for peak reliability and power delivery.
Compared to multi-layer steel (MLS) alternatives, this copper ring design provides greater conformability to minor surface irregularities on aluminum heads and blocks, ensuring a tighter seal under extreme heat cycles and boost levels up to 30 psi. It outperforms basic OEM replacements by resisting fatigue and blowout in repeated track or rally use, while maintaining even load distribution across the head surface for smoother operation and reduced risk of hot spots. For Subaru owners facing common EJ25 head gasket challenges, this component stands out as the practical, long-lasting option that keeps your engine running strong without frequent teardowns.
Precise Vehicle Fitment
- Make: Subaru
- Engine: EJ25 (2.5L DOHC turbocharged)
- Years: 2007 and later
- Models:
- WRX (2008–2014, GD/GG chassis)
- WRX STI (2008–2021, GR/GV chassis)
- Legacy GT (2005–2012, BL/BP chassis 2007+ compatibility confirmed)
- Outback XT (2005–2009, BL/BP chassis 2007+ compatibility confirmed)
- Forester XT (2008–2010, SH chassis)
Notes: Direct replacement for turbo EJ25 variants verify bore size for stroker or decked block builds. Not compatible with SOHC EJ25 non-turbo engines.
Product Specifications
- Part Number: HG-SUEJ25-101.3-1.2T
- UPC: 1037721243668
- Bore Diameter: 101.3mm (precisely matched to EJ25 cylinder sizing)
- Thickness: 1.2mm (0.047 inches) ideal for maintaining stock compression ratios in boosted applications
- Material: High-purity copper ring with reinforced fire ring for superior heat dissipation and pressure containment
- Construction: Single-layer copper with integrated sealing beads; designed for ARP or OEM head studs/bolts
- Performance Rating: Handles up to 1,000+ horsepower setups with proper head/block prep
What’s Included in Your Purchase
- (1) Supertech copper ring head gasket (one side only order two for full engine coverage)
- No additional hardware, seals, or fluids included (head bolts/studs sold separately)
Packaging and Shipping Details
- Part Weight: 1.5 lbs (0.68 kg)
- Box Dimensions: 12 inches (width) x 12 inches (length) x 2 inches (height)
- Shipping Weight: Approximately 1.8 lbs (includes packaging)
- UPC for Tracking: 1037721243668
Install this gasket with cleaned, flat-milled head and block surfaces for best results torque to Subaru specs (typically 22 ft-lbs initial, then 89 ft-lbs final in stages). Backed by Supertech’s reputation for precision manufacturing, the HG-SUEJ25-101.3-1.2T ensures your Subaru EJ25 stays sealed and responsive, whether on the street, strip, or stage. Order now for fast delivery and keep your build ahead of the curve.
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