Subaru OEM Head Gasket - Right Hand (18+ Crosstrek, 17+ Impreza) | 11044AA870

Overview

The Genuine Subaru OEM Head Gasket (Right Hand) — part number 11044AA870 — is the exact factory-replacement head gasket engineered for 2018+ Subaru Crosstrek and 2017+ Subaru Impreza models equipped with the FB-series horizontally opposed (boxer) engine. Designed to deliver a precise OEM seal between the cylinder head and engine block, this genuine Subaru part ensures leak-free combustion chamber integrity, optimal compression, and long-term engine reliability. If you're performing a head gasket replacement and need the right-hand (passenger side) gasket, this is the only part that guarantees a factory-correct fit.

Key Features & Benefits

• Genuine Subaru OEM Part — Manufactured to Subaru's exact factory specifications, ensuring proper fitment, sealing performance, and long-term durability that aftermarket alternatives cannot guarantee.
• Right-Hand (Passenger Side) Application — Engineered specifically for the right-hand cylinder head on Subaru's FA/FB-series boxer engine; do not interchange with the left-hand gasket.
• Precision Multi-Layer Construction — Uses the same multi-layer steel (MLS) construction as the original factory gasket to withstand extreme combustion pressures and thermal cycling.
• Exact OEM Seal Geometry — Fire rings, oil passage openings, coolant ports, and bolt hole locations match the factory block and head dimensions exactly, eliminating fitment guesswork.
• Protects Engine Integrity — A proper head gasket seal prevents coolant-oil mixing, combustion gas leakage, and overheating — critical to preserving your Subaru's engine life.
• Backed by Subaru's Factory Warranty — As a genuine OEM component, this part is covered under Subaru's standard parts warranty when installed correctly.

What's Included

• 1x Genuine Subaru OEM Head Gasket — Right Hand (Part No. 11044AA870)

Specifications

Fitment & Compatibility

This genuine Subaru head gasket (right hand) is designed for the following vehicles:

Important: Always confirm your vehicle's engine displacement, trim level, and VIN against the Subaru parts catalog before ordering. This is the right-hand gasket only — the left-hand gasket is a separate part number.

Installation

Head gasket replacement is a major engine repair requiring removal of the cylinder head, thorough surface cleaning and inspection, proper torque sequencing to factory specifications, and in most cases replacement of head bolts (torque-to-yield fasteners). Professional installation by a qualified Subaru technician is strongly recommended. Always use a complete head gasket set, replace coolant, and follow Subaru's factory service manual torque and re-torque procedures to ensure a lasting seal. Improper installation can result in immediate gasket failure.