HKS Adjustable Camshaft Pulleys for Nissan RB20, RB25, RB26 EnginesHKS Adjustable Camshaft Pulleys SpecificationsChoose HKS adjustable cam pulleys for a perfect camshaft timing. Fruit of long and meticulous R&D by HKS they ensure both great performance and high reliability. When your engine specifications change (stroker kit larger turbo different camshafts) the ideal valve timing changes too : these pulleys allow to precisely control engine timing giving you the best out of your set up. These pulleys are 10% lighter