Tomioka Adjustable Cam Gears Subaru WRX / STI EJ205 / EJ257 2004-2021

Part #: TR-AS1003. The TR cam gear set is the perfect addition to your customized EJ20/25 engine. Made from 6061 T-6 billet aluminum, these gears are hard anodized to resist wear and offer low friction. The two-piece design with 5 hardened bolts provides strong clamping force while keeping the weight down. Each cam gear has laser - etched markings, allowing easy adjustment of up to 10 degrees in both directions. This enables quick tuning to get the most horsepower from your chosen camshaft. The TR gears are also suitable for full - race engines when deleting intake AVCS on EJ257 and EJ207, though modification of the intake camshaft and its seal is required. Characteristics: Material is 6061 T - 6 billet aluminum, surface is hard anodized with hardened bolts, adjustable up to 10 degrees in both directions, and has laser - etched markings. Kit includes 4 cam gears. Fitment: Subaru Impreza WRX 2006 & Up+; Subaru Impreza STi 2004 & Up+; Subaru Legacy GT 2006 & Up+; Subaru Impreza GC8 1999 & Up. Modification may be needed, so consult your local installer.

Using the Tomioka adjustable cam gears is quite straightforward. First, make sure your engine is turned off and cooled down. Remove the old cam gears carefully and then install the new TR cam gears from the kit. You can use the laser - etched markings to adjust the gears up to 10 degrees in either direction according to your engine's needs. This will help you get the maximum horsepower from your camshaft. Note that if you're using these gears on an EJ257 or EJ207 engine and deleting the intake AVCS, you'll need to modify the intake camshaft and its seal. Always consult a local installer if you're unsure. For maintenance, regularly check the gears for any signs of wear. Since they are hard anodized, they are quite durable, but a visual inspection every few months can help ensure long - term performance. Also, make sure the hardened bolts are tightened properly to maintain the clamping force.