Subaru WRX FA20 Forged Short Block - Boosted Engineering

Built for WRX owners chasing serious power without the hassle of building an engine from scratch.

Starting with a brand new OEM Subaru short block, the BE FA20 Forged Short Block features a premium forged rotating assembly and is designed for high boost turbocharged applications.

Built exclusively in 10.5:1 compression, this combination offers an excellent balance of performance, reliability and knock resistance for high horsepower builds.

Features

• Brand new OEM Subaru short block foundation

• Open deck block configuration

• Forged 10.5:1 compression pistons

• Forged connecting rods

• High performance race bearings

• Precision balanced rotating assembly

• Brand new OEM rear main seal

• Professionally assembled and checked

Benefits

• Built for high horsepower turbocharged applications

• Suitable for street, track and motorsport use

• Designed for stock and upgraded turbo systems

• Retains OEM fitment and compatibility

• No need to source or rebuild a used engine

Optional Upgrades

Available at additional cost:

• Closed deck conversion

• ARP head studs

• Upgraded head gasket systems

• Cylinder head packages

• Camshaft and valvetrain upgrades

• Oiling system upgrades

Important Information

This product is supplied as a short block assembly only. Cylinder heads, front cover and external engine components are not included unless otherwise specified.

Designed specifically for Subaru WRX FA20 DIT applications.

Professional installation and engine calibration are strongly recommended.

Lead times may vary depending on parts availability and build schedule.

The following are typically required to run this kit at intended output. Boosted Engineering can supply or advise on all of them.

• ECU tune (custom)Boosted Engineering supplies base map
• Upgraded fuel systemInjectors, fuel pump — spec varies with output
• Upgraded ignitionR35 coilpack conversion recommended
• Upgraded clutchTwin-plate for higher-power builds
• Oil cooler kitRecommended for sustained high-load use
• Upgraded axlesFor 350+ kW builds

The Street Kit is designed for daily-drivable turbo builds with reliable, responsive power delivery. The Race Kit is oriented toward circuit and drag use where higher output and modular servicing are priorities.

The kit is designed for bolt-on installation in a suitably-equipped workshop. Installation is available at our Carrara QLD workshop, or through our trusted partner network in most metropolitan areas.

Approximate installation time — 20 to 30 hours depending on configuration and supporting work.