Subaru OEM Main Shaft Washer - 1.60 Subaru STI 2004-2021 / WRX 2015-2021 | 803067012

Product Fitment:

2007-2009 Subaru Legacy GT Spec B
2004-2021 Subaru STI
2015-2021 Subaru WRX

Overview

The Genuine Subaru OEM Main Shaft Washer (Part #803067012, thickness 1.60mm) is a precision transmission component designed for the Subaru WRX STI. This factory-spec washer ensures proper main shaft preload and clearance, maintaining transmission integrity and smooth gear engagement. Ideal for STI owners performing transmission rebuilds or replacing worn internal components with guaranteed OEM quality.

Key Features & Benefits

• Genuine Subaru OEM Part – Manufactured to exact factory specifications, ensuring a perfect fit and reliable performance every time.
• Precision Thickness (1.60mm) – Maintains correct main shaft end-play and preload, critical for transmission longevity and gear shift quality.
• Exact-Fit Guarantee – Engineered specifically for the STI's close-ratio 6-speed manual transmission; no modification or adaptation required.
• Factory Warranty Coverage – Backed by Subaru's genuine parts warranty for peace of mind.
• OEM Material & Finish – Manufactured from the same materials used on the original assembly line, resisting wear and deformation under high-torque STI driving conditions.

What's Included

• 1x Genuine Subaru Main Shaft Washer – 1.60mm (Part #803067012)

Installation

This Main Shaft Washer is an internal transmission component. Installation requires full transmission disassembly and is recommended for experienced transmission builders or professional technicians familiar with the Subaru STI 6-speed manual gearbox. Proper measurement of main shaft end-play should be performed to confirm the 1.60mm washer is the correct thickness for your rebuild. Consult the Subaru factory service manual for torque specifications and assembly procedures.