Best Head Gasket Solutions for Subaru EJ25 Engines
Finding a reliable head gasket for the Subaru EJ25 can be challenging due to model variety and engine revisions. This guide compiles top head gasket kits that cater to 2.5L EJ25 engines found in legacy Impreza, Forester, Outback, Baja, and Baja derivatives. Each choice emphasizes compatibility, coating technology, and complete gasket sets to help maintain proper sealing and engine longevity. Below are five strong options with key features to compare for your EJ25 rebuild or repair project.
| Product | Brand | Compatibility Note |
|---|---|---|
| FEL-PRO HS 26170 PT-1 Engine Cylinder Head Gasket Set | Fel-Pro | Subaru Baja/Forester/Impreza Impreza 1999-2005 |
| CNS MLS Head Gasket Set (EJ25) | CNS | 99-05 SAAB / Subaru 2.5L EJ25 |
| Partsflow Head Gasket Set with 12 Bolts | PartsFlow | Subaru Legacy/Outback/Impreza/Forester/Baja 1999-2003 |
| FEL-PRO HS 26415 PT-1 Engine Cylinder Head Gasket Set | Fel-Pro | Subaru Baja/Forester/Impreza/Legacy 2004-2011 |
| FEL-PRO 26415 PT Engine Cylinder Head Gasket | Fel-Pro | Subaru Baja/Forester/Impreza 2003-2010 |
FEL-PRO HS 26170 PT-1: Cylinder Head Gasket Set
The Fel-Pro HS 26170 PT-1 set is designed to fit a range of 2.5L EJ25 Subarus, including Baja, Forester, and Impreza through early 2000s. It features a proprietary coating to improve sealing on rougher surfaces up to 80 Ra and includes necessary gaskets for a complete head sealing solution. The product notes emphasize verification via the Amazon Confirmed Fit bar to ensure exact compatibility with your vehicle’s year, model, engine, and trim.
CNS MLS Head Gasket Set for EJ25
The CNS MLS Head Gasket Set targets 2.5L EJ25 engines with multi-layer steel head gaskets designed for durable sealing. This kit is compatible with 99-05 Subaru/Saab 2.5L H4 SOHC configurations. Note that the kit typically does not include upper plenum gaskets, so verify what is included before purchase and confirm fitment for your exact model.
PartsFlow Head Gasket Set with 12 Head Bolts
PartsFlow’s gasket set covers Subaru 2.5L EJ25 engines commonly used in Legacy, Outback, Impreza, Forester, and Baja models from 1999-2003. The kit includes a graphite head gasket, intake/exhaust manifold gaskets, valve cover gaskets, Viton seals, cam seals, and 12 head bolts. It provides an all-in-one option for a complete timing and sealing overhaul, with OE-compatible parts listed in the kit details.
FEL-PRO HS 26415 PT-1 Head Gasket Set
This Fel-Pro HS 26415 PT-1 kit is sized for 2006-2011 Foresters and related models, with compatible Baja, Outback, and Legacy variants. It highlights a PROPRIETARY coating to tolerate rough sealing surfaces up to 80 Ra and includes a complete range of gaskets and seals needed for a full head-gasket repair, with the same emphasis on fitment verification via the Amazon Confirmed Fit bar.
FEL-PRO 26415 PT Engine Head Gasket for Subaru Forester
The 26415 PT kit targets Forester models with EJ25 engines, covering 2003-2010 variants and related Baja configurations. It features the same proprietary coating to withstand rougher sealing surface finishes and provides a complete gasket set with recommended fit verification steps to ensure compatibility for the exact year and trim of the Subaru EJ25 engine you are servicing.
Head Stud Kit for EJ20 / EJ25 Engines
While primarily a fastener kit rather than a gasket, the Xotic Performance head studs provide higher clamp strength for EJ20 and EJ25 engines, which can be crucial during a gasket sealing process in turbo and high-compression setups. This option is relevant for builders seeking robust clamping and reduced risk of head lift under high cylinder pressures, alongside a gasket kit.
Subaru MLS Head Gasket Kit (OEM) for Older Models
This Genuine Subaru MLS head gasket kit is aimed at older 2.5 SOHC non-turbo engines. It includes the typical MLS gaskets and related seals required for a proper OEM-style replacement. It’s a solid reference point when comparing aftermarket options against Subaru’s original components for EJ25 applications.
Buying Guide
- Engine compatibility: EJ25 has several revisions across years. Always verify fitment using the Amazon Confirmed Fit tool or the vehicle’s VIN, year, make, model, and trim before purchasing.
- Gasket type: Multi-layer steel (MLS) gaskets offer strong sealing for higher compression engines, while composite or proprietary coatings improve sealing on diminished sealing surfaces. Choose based on engine condition and use-case (stock vs. high-performance).
- Included components: Some sets include head bolts, intake/exhaust gaskets, valve cover gaskets, and sealants. If your kit omits parts, you may need to source them separately to complete the job.
- Additional seals and guides: Submarque engines need accompanying cam seals, crank seals, and plenum gaskets. Review each kit’s included list to ensure all necessary parts are present.
- Quality and coatings: Proprietary coatings can improve sealing on rough surfaces but verify temperature tolerance and Ra rating compatibility with your engine head finish.
- Budget vs. risk: OEM or MLS-based kits often cost more but provide better long-term sealing for EJ25s with higher mileage. Factor planned use, climate, and maintenance history into your decision.
- Professional installation: Head gasket work is intricate and demands proper torque specs, surface flatness, and timing checks. If unsure, consult a qualified mechanic to avoid warping or improper sealing.
For EJ25 rebuilds, comparing the five highlighted products alongside OEM options can help identify a balance between fitment accuracy, sealing performance, and long-term reliability. Always confirm compatibility with your exact Subaru model and engine variant before purchasing any gasket kit.