Company23 Performance Parts & Tools

What are the best specialty tools for working on a Subaru WRX or STI? For Subaru-specific engine and transmission jobs — cam timing service, AVCS sprockets, transmission bearing carriers, and oversized drain plugs — purpose-built tools like the ones from Company23 are the best option. They are designed around Subaru's EJ and FA hardware, so tricky service jobs go smoothly instead of sideways.

Subaru's boxer engines have service quirks that generic tools simply don't address. The AVCS variable-valve-timing sprockets need dedicated holding tools to loosen and torque without damage, timing belt service on EJ turbo engines calls for cam lock tools, and transmissions use a sundial-style bearing carrier plus a Torx T70 drain plug most home toolboxes don't include. Improvising on these jobs is how good engines end up with broken timing components or rounded fasteners — the right tool pays for itself the first time you use it.

Company23 is a specialty tool brand built specifically around Subaru service work. Every tool in its catalog exists because a Subaru job demanded it: among Subaru builders it is known for its AVCS cam sprocket tools — intake and dual AVCS exhaust versions for 2008-2021 STI setups — plus cam lock tools for EJ timing belt service, the Sundial Bearing Carrier Tool that fits most Subaru models from 1993 onward, and the Torx T70 socket sized for the Subaru transmission drain plug. Alongside its tools it makes select service and replacement components, like a standard boost control solenoid for the 2008-2021 STI. If you maintain your own Subaru, this is the kind of focused catalog that fills exactly the gaps a general tool set leaves open.

Company23 tools pair naturally with the rest of a serious Subaru build. After the mechanical work is done, you can explore engine management to tune for your new hardware, browse the drivetrain section for supporting upgrades, or see what COBB offers for the WRX and STI platform. Popular Company23 pieces include the Sundial Bearing Carrier Tool for transmission work, the Torx T70 Socket for the transmission drain plug, and the Dual AVCS Exhaust Cam Sprocket Tool for 2008-2021 STI cam service. New to modifying your Subaru? Our post on common questions about aftermarket parts covers the basics.

Do I really need Subaru-specific tools, or can I get by with generic tools?

Generic tools can damage AVCS sprockets, round off transmission fasteners, or let cams jump timing — repairs that cost far more than the right tool. Purpose-built tools like Company23's hold, lock, and fit exactly as Subaru designed the hardware.

Will these tools fit my year and model?

Check each product's title for the year and model coverage — some tools are platform-wide (the Sundial tool covers most Subaru models from 1993 onward) while others are specific, like the 2008-2021 STI AVCS tools. Always check your year and model before ordering.

Are these tools usable by a home DIYer?

Many are straightforward — a drain plug socket or sprocket holding tool needs no special skill. Timing belt work with cam lock tools is more advanced; if you are new to it, have a shop handle it or study the factory service procedure first.

Do specialty tools come with any warranty?

Warranty terms vary by manufacturer and product. Check the individual product page for the coverage details on the tool you are buying.