Adjustable Timing Idler Bearing Kit

CJM Dual Bearing Eccentric Idler Pulley

The CJM Dual Bearing Eccentric Idler Pulley is designed to provide precise cam pulley alignment while offering superior strength and durability for high-power Subaru engines. Whether compensating for thicker head gaskets, resurfaced heads, or block machining, the CJM eccentric pulley allows accurate timing belt alignment and tension adjustment for any performance application.

Unlike standard single-bearing eccentric pulleys commonly used on OEM or mild street engines, the CJM design incorporates dual high-load bearings to greatly improve stability and long-term reliability under extreme RPM and power levels. This upgrade eliminates bearing deflection and reduces wear, ensuring consistent cam timing even in demanding race environments.

Each pulley is CNC machined from billet aluminum and engineered to be the lightest dual-bearing eccentric idler available, providing exceptional strength and precision. The CJM Dual Bearing Eccentric Idler Pulley is ideal for both high-performance street and dedicated competition builds where precision, strength, and longevity are critical.