Billet Exhaust Camshaft Sprocket Kit

CJM Billet Exhaust Camshaft Sprocket Kit

The CJM Alloy Camshaft Sprocket Kit is engineered as a high-performance replacement for the factory plastic Bakelite sprockets found on Subaru single-AVCS engines. A known failure point of the OEM sprockets is the center hub breaking away from the main body, which can lead to severe timing loss and potentially catastrophic engine failure.

CJM addresses this issue by CNC-machining each sprocket from a single piece of high-grade aluminum alloy, ensuring superior structural integrity, strength, and heat resistance—ideal for high-power, high-RPM, and motorsport applications.

High-Grade Billet Aluminum Construction
Each CJM sprocket is CNC machined from a single block of premium aluminum, offering far greater durability than Subaru’s OEM plastic units, which are known to degrade and become brittle over time. 

Precision Engineering & Proven Performance
Each sprocket is machined to exacting tolerances for perfect camshaft alignment and balance, ensuring consistent valve timing accuracy and long service life in both street and competition engines.

Fitment
The CJM Alloy Camshaft Sprocket Kit includes left-hand and right-hand exhaust sprockets for Subaru single AVCS engines, compatible with:

2004–2007 STI
2006–2014 WRX
2004–2013Forester XT
2005–2009 Legacy GT

Replaces OEM part numbers: LH Exhaust 13054AA020 and RH Exhaust 13049AA020.