Subaru OEM Friction Plate (04-21 STI) | 31389AA010

Overview

The Genuine Subaru OEM Friction Plate (Part #31389AA010) is a factory-original transmission component designed specifically for the 2004–2021 Subaru WRX STI. Engineered to Subaru's exacting standards, this friction plate ensures smooth, consistent clutch engagement and long-lasting drivetrain performance in the STI's high-performance manual transmission. If you're restoring OEM function or replacing a worn clutch pack component, this is the exact part that came from the factory.

Key Features & Benefits

• Genuine Subaru OEM Quality – Manufactured to factory specifications for a guaranteed exact fit and optimal performance in your STI's transmission.
• Precision Friction Material – Factory-grade friction compound delivers consistent clutch engagement, smooth shifts, and reliable torque transfer under high-performance driving conditions.
• Exact-Fit Replacement – Designed as a direct drop-in replacement for the OEM component, eliminating guesswork and compatibility concerns.
• Long-Term Durability – Built to withstand the demands of the STI's high-output EJ257 and FA20DIT powertrains, including track and spirited street use.
• Factory Warranty Backed – Genuine Subaru parts are covered under Subaru's OEM parts warranty when installed by an authorized dealer or qualified technician.
• Correct Part Number Cross-Reference – OEM part number 31389AA010 ensures you receive the precise component specified by Subaru engineering.

What's Included

• 1x Genuine Subaru Friction Plate (Part #31389AA010)

Specifications

Fitment & Compatibility

This Genuine Subaru Friction Plate (31389AA010) is compatible with the following vehicles:

Always verify your specific vehicle's VIN and transmission code before ordering to confirm fitment. If you are unsure whether this part fits your exact configuration, consult your Subaru parts catalog using part number 31389AA010.

Installation

Installation of this friction plate requires disassembly of the transmission and is recommended for experienced technicians or qualified Subaru dealership service centers. This is not a bolt-on repair — proper torque specifications, clutch pack clearances, and transmission reassembly procedures must be followed as outlined in the Subaru service manual. Professional installation is strongly advised to ensure correct fitment and to maintain warranty coverage.