Engine Internals – Subaru EJ20 / EJ25

The Subaru EJ20 and EJ25 engines are iconic powerplants used in performance models like the WRX and STI. Known for their turbocharged flat-four layout, they offer great tuning potential—but demand strong internals when pushing the limits.

At Chicane Australia, we offer a complete range of engine internals for EJ20 and EJ25 engines including forged pistons, H-beam and I-beam rods, race-spec bearings, multi-layer steel head gaskets, and valvetrain components optimised for high-RPM and high-boost applications.

Choose from trusted brands like CP Carrillo, ACL, ARP, Cometic, GSC Power Division, and Supertech—proven in street, rally, and time attack builds worldwide.

Upgrade your EJ build with confidence using the best internals available in Australia.

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ARP 2000 Cylinder Head Stud Kit – Subaru WRX, STI, Forester XT, Liberty GT (EJ20/EJ25) - Chicane Australia
ARP
ARP 2000 Cylinder Head Stud Kit – Subaru WRX, STI, Forester XT, Liberty GT (EJ20/EJ25)

SKU: 260-4701

$599.00
In Stock
NGK Iridium Spark Plugs Heat Range #7 Subaru EJ20 WRX/STI / VW Audi 2.0 TSI TFSI EA113 EA888 Gen 1-2 - Chicane Australia NGK Iridium Spark Plugs Heat Range #7 Subaru EJ20 WRX/STI / VW Audi 2.0 TSI TFSI EA113 EA888 Gen 1-2 - Chicane Australia
NGK
NGK Iridium Spark Plugs Heat Range #7 Subaru EJ20 WRX/STI / VW Audi 2.0 TSI TFSI EA113 EA888 Gen 1-2

SKU: BKR7EIX

$84.95
In Stock
King Racing Connecting Rod Bearing Set – Subaru EJ20 / EJ22 / EJ25 (Incl. Turbo) - Chicane Australia King Racing Connecting Rod Bearing Set – Subaru EJ20 / EJ22 / EJ25 (Incl. Turbo) - Chicane Australia
King Racing Bearings
King Racing Connecting Rod Bearing Set – Subaru EJ20 / EJ22 / EJ25 (Incl. Turbo)

SKU: CR4125XPG

$89.00
Available to Order
King Racing Main Bearing Set – Subaru EJ20 / EJ22 / EJ25 (Incl. Turbo) - Chicane Australia King Racing Main Bearing Set – Subaru EJ20 / EJ22 / EJ25 (Incl. Turbo) - Chicane Australia
King Racing Bearings
King Racing Main Bearing Set – Subaru EJ20 / EJ22 / EJ25 (Incl. Turbo)

SKU: MB5382XPG

$179.00
Available to Order
Manley Piston Set – Subaru WRX STI EJ257 2.5L (99.50mm Bore / -14.00cc / 1.130in CH) Manley Piston Set – Subaru WRX STI EJ257 2.5L (99.50mm Bore / -14.00cc / 1.130in CH)
Manley
Manley Piston Set – Subaru WRX STI EJ257 2.5L (99.50mm Bore / -14.00cc / 1.130in CH)

SKU: 622100C-4

$1,499.00
Available to Order
Manley H Beam Connecting Rods – Subaru EJ20/EJ25 - Chicane Australia
Manley
Manley H Beam Connecting Rods – Subaru EJ20/EJ25

SKU: 14024-4

From $1,119.00
Available to Order
NGK Iridium Spark Plugs Heat Range #7 Subaru EJ20 WRX/STI / VW Audi 2.0 TSI TFSI EA113 EA888 Gen 1-2 - Chicane Australia NGK Iridium Spark Plugs Heat Range #7 Subaru EJ25 / Mitsubishi Evo 9 - Chicane Australia
NGK
NGK Iridium Spark Plugs Heat Range #7 Subaru EJ25 / Mitsubishi Evo 9

SKU: LFR7AIX

$84.95
Available to Order
Tomei Timing Belt Guide – Subaru WRX/STI/Forester XT/Liberty GT (EJ20/EJ25) Tomei Timing Belt Guide – Subaru WRX/STI/Forester XT/Liberty GT (EJ20/EJ25)
Tomei
Tomei Timing Belt Guide – Subaru WRX/STI/Forester XT/Liberty GT (EJ20/EJ25)

SKU: 191263

$109.00
Available to Order
NGK Laser Iridium Spark Plugs – Heat Range #7 (Set of 4) – Subaru WRX / STI / Liberty GT / Forester XT EJ25
NGK
NGK Laser Iridium Spark Plugs – Heat Range #7 (Set of 4) – Subaru WRX / STI / Liberty GT / Forester XT EJ25

SKU: ILFR7H

$129.00
Available to Order
Cometic MLS Head Gasket – Subaru EJ255 / EJ257 (2008–2021) – 101mm Bore, 1.0mm Thickness
Cometic
Cometic MLS Head Gasket – Subaru EJ255 / EJ257 (2008–2021) – 101mm Bore, 1.0mm Thickness

SKU: C4574-040

$259.00
Available to Order
Mahle PowerPak Forged Pistons 92.50mm – Subaru EJ20 2.2L Stroker (8.2:1 CR) - Chicane Australia
Mahle
Mahle PowerPak Forged Pistons 92.50mm – Subaru EJ20 2.2L Stroker (8.2:1 CR)

SKU: 929928142

$1,499.00
Available to Order
HKS Oil Filter – M20x1.5 – Honda Civic Type R FK8/FL5 & Subaru WRX/STI - Chicane Australia
HKS
HKS Oil Filter – M20x1.5 – Honda Civic Type R FK8/FL5 & Subaru WRX/STI

SKU: 52009-AK005

$39.00
Available to Order
ARP CUSTOM AGE 625+ CYLINDER HEAD STUD KIT Subaru WRX/STI/Forester/Liberty (EJ20/EJ25) - Chicane Australia
ARP
ARP CUSTOM AGE 625+ CYLINDER HEAD STUD KIT Subaru WRX/STI/Forester/Liberty (EJ20/EJ25)

SKU: 260-4704

$1,299.00
Available to Order
HKS Fine Tune Timing Belt – Subaru WRX, STI, Forester XT, Liberty GT (EJ20/EJ25) - Chicane Australia HKS Fine Tune Timing Belt – Subaru WRX, STI, Forester XT, Liberty GT (EJ20/EJ25) - Chicane Australia
HKS
HKS Fine Tune Timing Belt – Subaru WRX, STI, Forester XT, Liberty GT (EJ20/EJ25)

SKU: 24999-AF001

$399.00
Available to Order
ACL Race Conrod Bearings Set – Subaru EJ20/EJ22/EJ25 (52mm Journal) - Chicane Australia ACL Race Conrod Bearings Set – Subaru EJ20/EJ22/EJ25 (52mm Journal) - Chicane Australia
ACL
ACL Race Conrod Bearings Set – Subaru EJ20/EJ22/EJ25 (52mm Journal)

SKU: 4B8296H-STD

$85.00
In Stock
ACL Race Main Bearings Set – Subaru EJ20/EJ22/EJ25 (Thrust Position 5) - Chicane Australia ACL Race Main Bearings Set – Subaru EJ20/EJ22/EJ25 (Thrust Position 5) - Chicane Australia
ACL
ACL Race Main Bearings Set – Subaru EJ20/EJ22/EJ25 (Thrust Position 5)

SKU: 5M8309H-STD

$179.00
In Stock
Subaru EJ257 Nitrided Crankshaft – WRX 06–14 / STI 06+ / Forester 03–13 / Liberty 07–09
STI
Subaru EJ257 Nitrided Crankshaft – WRX 06–14 / STI 06+ / Forester 03–13 / Liberty 07–09

SKU: 12200AA430

$799.00
Available to Order
Manley Turbo Tuff Pro Series I-Beam Connecting Rod Set – Subaru EJ205 / EJ257 (5.216in Length)
Manley
Manley Turbo Tuff Pro Series I-Beam Connecting Rod Set – Subaru EJ205 / EJ257 (5.216in Length)

SKU: 14436-4

$2,399.00
Available to Order
Manley Subaru 2.5L EJ257 WRX STI Piston Set – 100.00mm Bore, 1.130in CH, -26.00cc Manley Subaru 2.5L EJ257 WRX STI Piston Set – 100.00mm Bore, 1.130in CH, -26.00cc
Manley
Manley Subaru 2.5L EJ257 WRX STI Piston Set – 100.00mm Bore, 1.130in CH, -26.00cc

SKU: 632405CE-4

$1,999.00
Available to Order
Subaru Genuine Oil Pan Bolt Kit – WRX / STI / Forester XT / Liberty GT (EJ20/EJ25) Subaru Genuine Oil Pan Bolt Kit – WRX / STI / Forester XT / Liberty GT (EJ20/EJ25)
Subaru
Subaru Genuine Oil Pan Bolt Kit – WRX / STI / Forester XT / Liberty GT (EJ20/EJ25)

SKU: 800506350

$1.95
Available to Order
Torque Solution Street Series Oil Baffle Windage Tray – Subaru EJ20 / EJ25 Engines with EJ25 Oil Pan Torque Solution Street Series Oil Baffle Windage Tray – Subaru EJ20 / EJ25 Engines with EJ25 Oil Pan
Torque Solution
Torque Solution Street Series Oil Baffle Windage Tray – Subaru EJ20 / EJ25 Engines with EJ25 Oil Pan

SKU: TS-SU-599-BS

$169.00
Available to Order
Torque Solution V2 HD Oil Pickup – Subaru EJ20 / EJ25 Engines with EJ25 Oil Pan Torque Solution V2 HD Oil Pickup – Subaru EJ20 / EJ25 Engines with EJ25 Oil Pan
Torque Solution
Torque Solution V2 HD Oil Pickup – Subaru EJ20 / EJ25 Engines with EJ25 Oil Pan

SKU: TS-SU-599-PU.2

$314.00
Available to Order
Subaru Genuine 12mm Oil Pump – WRX / STI / Forester XT / Liberty GT (EJ20 / EJ25) Subaru Genuine 12mm Oil Pump – WRX / STI / Forester XT / Liberty GT (EJ20 / EJ25)
Subaru
Subaru Genuine 12mm Oil Pump – WRX / STI / Forester XT / Liberty GT (EJ20 / EJ25)

SKU: 15010AA310

$299.00
Available to Order
CP Pistons Forged Pistons (Stroker) – Subaru EJ257 - Chicane Australia
CP Pistons
CP Pistons Forged Pistons (Stroker) – Subaru EJ257

SKU: SC7433

$1,799.00
Available to Order
CP Pistons Forged Pistons (Stroker) – Subaru EJ257 - Chicane Australia
CP Pistons
CP Pistons Forged Pistons – Subaru EJ20 / EJ205

SKU: SC7399

$1,799.00
Available to Order
CP Pistons Forged Pistons (Stroker) – Subaru EJ257 - Chicane Australia
CP Pistons
CP Pistons Forged Pistons – Subaru EJ257

SKU: SC7420

From $1,639.00
Available to Order
Ferrea Intake Valves – Subaru EJ20/EJ25 - Chicane Australia Ferrea Intake Valves – Subaru EJ20/EJ25 - Chicane Australia
Ferrea
Ferrea Intake Valves – Subaru EJ20/EJ25

SKU: F1967-8

$575.00
Available to Order
Ferrea Exhaust Valves – Subaru EJ20/EJ25 - Chicane Australia Ferrea Exhaust Valves – Subaru EJ20/EJ25 - Chicane Australia
Ferrea
Ferrea Exhaust Valves – Subaru EJ20/EJ25

SKU: F1968P-8

$799.00
Available to Order