Company23 Subaru EJ Timing Belt & Water Pump Kits

Keep your Subaru EJ engine running reliably with Company23 timing belt and water pump kits. These kits feature genuine Japanese OE-manufacturer components sourced directly from the manufacturers that supply Subaru.

Company23 has carefully selected each component to deliver OEM-quality performance, proper fitment and long-term reliability.

Key Features

• Genuine OE-manufacturer components sourced directly from trusted suppliers.

• Laser-marked components for Company23 quality identification.

• Company23-branded timing belts manufactured by Mitsuboshi.

• Japanese-manufactured idlers, tensioners and water pumps from established OE suppliers.

• Model-specific kits to ensure the correct components for your Subaru.

• Custom packaging designed to protect components during storage and shipping.

Vehicle Fitment

DOHC Timing Belt Kits

Company23 Kit 575

• 2002–2014 Subaru WRX

• 2004–2011 Subaru STI

• 2005–2009 Subaru Outback XT

• 2004–2013 Subaru Forester XT

• 2004–2006 Subaru Baja XT

• 2005–2012 Subaru Legacy 2.5GT

Company23 Kit 576

• 2012–2021 Subaru STI

• 2012 Subaru Legacy 2.5GT

Water Pump Kit Fitment

Company23 Part 579

• 2002–2007 Subaru WRX

• 2004–2021 Subaru STI

• 2004–2006 Subaru Baja XT

• 2004–2007 Subaru Forester XT

• 2005–2009 Subaru Outback XT

• 2005–2009 Subaru Legacy 2.5GT

Company23 Part 580

• 2008–2014 Subaru WRX

• 2008–2013 Subaru Forester XT

Important: 2002–2003 WRX models require the longer small idler bolt when upgrading to the later double-bearing idler. Select the appropriate bolt option when ordering.

Genuine Japanese OE-Manufacturer Components

Not all timing kits are created equal.

Company23 sources its timing components directly from the same established manufacturers that supply Subaru, rather than relying on aftermarket parts marketed simply as OEM-equivalent.

Every component is carefully selected to deliver the quality and reliability expected from original equipment.

Quality Components Without Compromise

Company23 works directly with component manufacturers to ensure authenticity and consistent quality.

By sourcing directly from trusted suppliers, Company23 helps eliminate the risk of counterfeit components entering its timing kits.

Component Manufacturers

Company23 believes in complete transparency about the components included in its kits.

• Timing belts: Mitsuboshi, featuring Company23 branding.

• Timing belt tensioners: NTN.

• Idler bearings: NSK, Koyo and NTN.

• Water pumps: Aisin.

These manufacturers are established suppliers of Japanese automotive components and are recognized for their OE manufacturing expertise.

Engineered With Attention to Detail

Company23 develops its timing kits with Subaru enthusiasts in mind. Every component, fitment specification and packaging detail has been considered to provide a complete and reliable maintenance solution.

Upgraded Small Idler Compatibility

Owners of 2002–2003 WRX models can upgrade to the later double-bearing small idler design introduced on 2004+ models.

This upgrade requires a longer mounting bolt, available as an optional selection.

Custom Protective Packaging

Company23 timing kits and water pumps arrive in custom packaging designed specifically for their components.

Packaging dimensions and belt storage requirements have been developed with input from the belt manufacturer to help protect the components before installation.

Model-Year-Specific Components

Subaru introduced a wider timing belt on the STI for the 2013 model year.

Company23 accounts for these model-specific differences to ensure the appropriate components are supplied for each application.

OEM-Quality Black Timing Belts

Company23 deliberately uses black Mitsuboshi timing belts rather than coloured alternatives.

Some coloured timing belts can leave residue on idlers and inside timing covers as their coloured coatings wear.

Company23's black timing belts provide proven OE-manufacturer quality without unnecessary cosmetic coatings. Each belt features additional Company23 branding.

Subaru OEM Part Number Cross Reference

The following Subaru OEM part numbers are provided for component identification and cross-referencing.

Company23 Timing Kit 575

Component	Subaru OEM Part Number
Timing Belt	13028AA240
Timing Belt Tensioner	13033AA042
Smooth Idler (Qty. 2)	13073AA142
Cogged Idler	13085AA080
Small Idler	13073AA230

Company23 Timing Kit 576

Component	Subaru OEM Part Number
Timing Belt	13028AA250
Timing Belt Tensioner	13033AA042
Smooth Idler (Qty. 2)	13073AA142
Cogged Idler	13085AA080
Small Idler	13073AA230

Water Pump Cross Reference

Company23 Part Number	Subaru OEM Part Number
581	21111AA280
582	21111AA110

Please Note: Confirm your vehicle's model, model year and selected kit configuration before ordering. Some applications require specific components or additional hardware.