High-Volume Oil Pumps

The best high-volume oil pump choice in this collection depends on your engine: Subaru EJ owners get an ACL Orbit high performance pump listed for the 2002-2014 WRX and STI, while Honda K-series builders get a PRL Motorsports oil pump DIY swap kit for the K24Z7 and K24Z3. A third ACL pump covers the 1995-1999 Eclipse Turbo 4G63, so match the pump to your engine code first.

The oil pump keeps pressurised oil moving to bearings, turbo, and valvetrain, and it is usually replaced during an engine build or timing-service teardown rather than as a casual bolt-on. Because the pump lives inside the engine, fitment is defined by engine code, not just by car model.

ACL is best known in this catalogue for its Race Series engine bearings, and its Orbit oil pumps apply the same engine-internals focus to lubrication. This collection lists three ACL pumps: the Orbit high performance pump for Subaru EJ20 and EJ22 applications, including 2002-2014 WRX and STI, a Honda and Acura pump for B20B4, B18C1, B16A2, and B20Z2 engines, and a pump for the Eclipse Turbo 4G63 and 1993 Galant 4G63K. One part number per engine family, rather than a universal fit.

PRL Motorsports is known for bolt-on intake, intercooler, and engine hardware for Honda and Subaru platforms, and its oil pump offering is a builder-focused swap rather than a direct replacement. The PRL oil pump DIY swap kit covers the 2012-2015 Civic Si K24Z7 and Acura TSX K24Z3 using the PRB Type-S pump pattern named in the title. PRL also lists the matching Type-S windage tray bracket separately — the supporting hardware a pump swap needs.

The pump is only one part of the lubrication system: pair it with the right filter from the oil filters range and browse the wider oil system collection for pans and hardware. For background on the Subaru engines the ACL pump serves, read our EJ257 engine guide.

Check your engine code against the product title first: these Subaru, Honda, and Mitsubishi pumps are not interchangeable.

When should I replace my oil pump?

Most owners replace the pump during an engine build or deep timing-side service, because access is labour-intensive. If oil pressure is the concern, confirm the cause first — a new pump does not fix worn bearings.

Is the PRL kit a direct replacement for my Civic Si?

No — it is listed as a DIY swap kit for the 2012-2015 Civic Si K24Z7 and Acura TSX K24Z3, built around the PRB Type-S pump pattern. Read the full product description for what the swap involves, and note the windage tray bracket is listed separately.

Which ACL pump fits my WRX?

This collection lists the ACL Orbit high performance pump for EJ20 and EJ22 applications including the 2002-2014 WRX and STI. Check your exact engine code and year against the product title before ordering; later FA-engine cars are not named in that listing.

Does fitting a high performance oil pump require a tune?

An oil pump alone does not change fuelling or boost, so it is not a tune-required part the way an intake or turbo change can be. It is normally fitted as part of a wider build, which may need tuning as a whole.