At our workshop, we're always striving to improve the performance of engines. One of the key ways we achieve this is by increasing the cubic feet per minute (cfm) capabilities of a cylinder head. Essentially, this means we're increasing the volume of air that can flow through the engine, regardless of the RPM. When we execute a head porting job well, we consistently see impressive gains in performance across the board. And, our latest upgrade for the Porsche m44.41 is no exception. We've leveraged years of experience in head porting to develop an upgrade that's sure to impress. The new heads feature a +2mm inlet valve, as well as new valve seats and guides for added safety. We're confident that the cfm graphs will speak for themselves. With this upgrade, we're excited to see our customers' engines perform at their very best.