With its 256 degree duration & 10.2mm lift on the intake side and 264 degree duration & 10.5mm lift on the exhaust side, the Super Camshaft improves the airflow significantly over the stock cam shaft. This cam shaft is also used for the Mines Complete Engine for R33 GT-R. Camshafts are compatible with the RB series engine. If interested, please contact us at Bulletproof Automotive for more information regarding pricing, fitment, shipping costs, as well as installation recommendations. Note: Selecting the proper shims might take a time when installing the product.