The Golden Eagle High - Performance Adjustable Cam Gear for Nissan SR20 is perfect for racing enthusiasts who own a Nissan SR20. Whether you're on the race track or just want to boost your car's performance, this cam gear is a must - have. It's great for engines with custom cams as it helps take full advantage of the new cam lob design. The center piece is made of billet 7075 aluminum, and the outer gear is hardened steel. This combination gives you a reliable and high - performing product.