Subaru OEM Dual AVCS Camshafts (08-10 STI) | 13031AA710

Overview

The Genuine Subaru OEM Dual AVCS Camshaft Set (Part #13031AA710) is the factory-original camshaft assembly designed specifically for the 2008–2010 Subaru Impreza WRX STI. Built to exact OEM specifications, these camshafts are engineered to work seamlessly with the EJ257 engine's Active Valve Control System (AVCS), delivering the precise variable valve timing performance your STI was factory-tuned to produce. Choosing genuine OEM camshafts ensures correct fitment, factory-level reliability, and compatibility with your engine's AVCS hardware — no modifications or adapters required.

Key Features & Benefits

• Genuine Subaru OEM Part — Manufactured to exact factory specifications; identical to the camshafts installed on the assembly line for guaranteed compatibility and performance.
• Dual AVCS Compatibility — Engineered for the EJ257's Dual Active Valve Control System, enabling precise intake and exhaust variable valve timing for optimized power delivery and efficiency across the RPM range.
• Exact-Fit Guarantee — Direct OEM replacement with no machining, modification, or shimming required; bolt-in fitment for 2008–2010 STI applications.
• Factory Lobe Profile — Maintains the factory-correct cam lobe geometry for stock power output, idle quality, and emissions compliance.
• Subaru Factory Warranty — Backed by Subaru's OEM parts warranty, providing peace of mind that aftermarket alternatives simply cannot match.
• Premium Materials — Cast to OEM standards with surface hardening treatments for long-term wear resistance under high-performance STI operating conditions.

What's Included

• 1x Genuine Subaru OEM Dual AVCS Camshaft (Part #13031AA710)
• OEM packaging with Subaru part number verification

Note: Please verify whether this listing includes the intake camshaft, exhaust camshaft, or the complete set. Confirm with your Subaru parts diagram for your specific application before ordering.

Specifications

Fitment & Compatibility

This genuine Subaru OEM camshaft (Part #13031AA710) is compatible with the following vehicles:

Important: Always verify fitment using your vehicle's VIN and Subaru's official parts catalog. The 2008–2010 STI uses the Dual AVCS variant of the EJ257 — confirm your engine configuration before purchasing. Earlier (2004–2007) STI models use a different camshaft design and are not compatible with this part number.

Installation

Camshaft replacement on the EJ257 engine is an advanced procedure requiring removal of the cylinder heads, valve train components, and AVCS oil control solenoids. Professional installation by a certified Subaru technician or experienced boxer-engine specialist is strongly recommended. Proper torque sequences, cam timing alignment, and AVCS actuator inspection are critical to a successful installation. Always replace cam journals, inspect oil passages, and verify AVCS solenoid function during installation. Refer to the Subaru EJ257 factory service manual for complete torque specifications and step-by-step procedures.