IAG offers a package combining the IAG Racing Timing Belt with our timing belt guide, and V2 Competition Series Tensioner for your 2004-21 Subaru STI, 2002-04 WRX, 2004-13 Forester XT, and 05-12 Legacy GT. Inside the package is our IAG Billet Timing Belt Guide which is the best method to prevent your Subaru EJ Series engine from skipping a beat. Engineered and manufactured in our facility in Westminster, Maryland, each guide is machined from a single piece of 6061 billet aluminum and then anodized black for a protective finish. Next, the package features our IAG V2 Competition "WRC Style" Tensioner which uses a combination of proven parts from older Subaru vehicles and an additional roller to control belt timing and tension. Made from billet aluminum, the base is CNC machined in-house and anodized black for corrosion protection. The IAG "WRC Style" Tensioner uses NTN OEM style rollers to ensure the reliability of the product. Included additionally, the IAG Performance Red Racing Timing Belt is designed to work with all Subaru EJ series engines. Optimized for strength and designed to allow stable belt tension even when heat expansion occurs in high power/high RPM Subaru engines. IAG Red Racing belts are lightweight and utilize EPDM Rubber for increased durability and performance in all climates. The Kevlar construction is 300% stronger than the OEM Subaru timing belt and is also three times more heat resistant. The belt teeth are made of H-NBR grade rubber for additional strength.