The Complete Cobb Stage 1 Solution for the VA STI

The Cobb Stage 1 Power Package for the 2015-2021 Subaru WRX STI packages the Accessport V3 with matched hardware upgrades that are designed and validated as a system. All components are calibrated together — the OTS tune loaded on the Accessport reflects the exact hardware in the box.

The Accessport V3: Tuning That Knows What Hardware You're Running

The Accessport V3 is the center of every Cobb Power Package — and the reason the package format works. Cobb develops the OTS tune specifically for the hardware combination in each package, meaning the Accessport isn't just applying a generic boost increase. It knows the intake is there. It knows the intercooler capacity. The fuel, ignition, and boost maps are calibrated around what's actually in the box. The result is a tune that performs correctly out of the gate rather than one that needs refinement after the fact.

Validated Together, Installed Together

Every Cobb Power Package is tested on Cobb's own VA STI development vehicles in Austin before an OTS map is released. The hardware combination you're buying is the hardware combination that generated the dyno numbers Cobb publishes. Installation of each component is bolt-in at factory locations — no custom fabrication, no specialist required. The Accessport loads the map through the OBD-II port and everything is live on the first start.

Key Features

• Cobb Stage 1 Power Package — validated hardware and tune bundle
• Accessport V3 with platform-specific OTS tune for this exact package
• All components designed, tested, and tuned together by Cobb
• Accessport V3 is retransferrable and fully reversible to stock
• Platform: 2015-2021 Subaru WRX STI

Fitment Notes

• Platform: 2015-2021 Subaru WRX STI
• Verify MT vs CVT compatibility by SKU before ordering
• Accessport V3 is vehicle-specific — confirm fitment at cobbtuning.com
• NOTE: Ships via UPS/FedEx — signature required at delivery

Straight From Subispeed

Cobb Power Packages remove the guesswork from building a VA STI. Instead of independently selecting an intake, intercooler, and tune and hoping they work well together, you get a system that Cobb has already proven on the dyno. The Accessport V3 is the key piece — as your build evolves beyond Stage 1, it carries forward to the next map rather than becoming obsolete. If you're ready to commit to a VA STI build, starting with a Cobb package gives you a solid, validated foundation to build from.

What's Included

• Cobb Accessport V3 with OTS tune

About Cobb Tuning

Cobb Tuning has been developing performance parts and tuning solutions for Subaru vehicles since 1999. Based in Austin, Texas, Cobb built their reputation on the Accessport — the most widely used Subaru ECU tuning device on the market — and expanded that into a full ecosystem of intake, exhaust, drivetrain, and engine bay accessories engineered specifically for the platforms they support. Every Cobb product is developed in-house and validated on their own test vehicles before it reaches customers. Subispeed carries the full Cobb catalog because their engineering standards and platform-specific development process consistently produce parts that work exactly as advertised.