Engine

Main bearing set from ACL Race Bearings, tri-metal construction, for the rear thrust position 5 configuration. Features a reduced-thickness overlay plate, hardened steel backs and 3/4 grooved main bearings for improved oil flow. Available in standard, 0.25mm and 0.50mm oversize sizes for a wide range of Subaru models.

Big end bearing set from ACL Race Bearings, tri-metal construction, with a reduced-thickness overlay plate and hardened steel-backed rod bearings for improved retention. Available in standard, 0.25mm and 0.50mm oversize sizes for a wide range of Subaru models.

IAG Stage 3 closed deck converted case halves for the Subaru EJ25 engine, using CNC-machined cast inserts to strengthen the factory semi-open deck at the top of the cylinder sleeves. Supplied as a new EJ25 case machined to accept a 99.75mm overbore; bore and hone required before assembly.

This Extreme 11mm head stud kit from RCM (reference RCM1540) uses aircraft-grade S99 steel studs with a manufacturer-stated tensile strength in excess of 237,000 psi (1640 MPa). Supplied with RCM assembly lubricant. Vehicle fitment needs confirmation.

This 14mm/12mm head stud kit from RCM uses aircraft-grade S99 steel studs to replace the standard 11mm Subaru head bolts, offering higher tensile strength and clamping force. Source material describes it as suited to higher-output EJ20/22/25 builds.

This 14mm/14mm head stud kit from RCM uses aircraft-grade S99 steel studs to replace the standard 11mm Subaru head bolts, offering higher tensile strength and clamping force. Source material describes it as suited to higher-output EJ20/22/25 builds.

This 11mm performance head stud kit from RCM replaces the standard cylinder head bolts on Subaru EJ-series engines. Made from S99 steel with a manufacturer-stated minimum yield strength of 1080 MPa, supplied with ARP nuts, washers and RCM assembly lubricant.

RCM 340 high-output in-tank electric fuel pump kit, supplying up to 340 litres/hour and directly replacing the standard fuel pump assembly. Fits via the floor pan inspection cover on turbocharged Impreza models from 1992-2007. Please confirm compatibility with your specific vehicle before ordering.

Top feed billet fuel rail pair for Spec-C spec Subaru Impreza GD/GG (2003–2007, Blobeye/Hawkeye), designed for performance top feed injectors. T6061 aluminium extrusion with a black anodised finish.

Top feed billet fuel rail pair for UK, USDM and Euro spec Subaru models, designed for OEM top feed injectors. T6061 aluminium extrusion with a black anodised finish. A higher-flow performance version is available separately (RCM3366).