D16 CNC Cylinder Head

The Outlaw D16 CNC cylinder head from 4 Piston Racing is engineered to bring a new level of quality and performance to Honda D16 engine enthusiasts and racers. This head boasts a highly developed port design that excels by providing substantial CFM gains across all lift points, not just at high lift where many competing heads show gains but drop off significantly at lower lifts. This makes it particularly effective for D16 owners running smaller lift camshafts. The 4P Outlaw D16 CNC head is precision-machined using slow-cut 5-axis CNC porting for unparalleled quality. It features a high-velocity intake port design and a unique, power-producing exhaust port design. Buyers can choose between OEM or Manganese Bronze valve guides, with the latter offering full-length support for valve stability. The CNC valve job is performed using the latest NEWEN Fixed Turning technology. 4P configures the cylinder head specifically for your application, whether it's all-motor or forced induction, with a focus on maximizing horsepower, ensuring responsiveness, and increasing engine longevity. The product is recommended for street use, SFWD/Outlaw Turbo Race, Outlaw All Motor, and Road Race applications, and is compatible with E85, Methanol, and Gasoline fuels. The D16Z6 and D16Y8 engine variants are available. This head achieved 260+ CFM on a stock-size valve and includes installation tips, engine setup clearance specifications, and a flow chart specific to the head. All heads require a core. Customers can either send in their existing cylinder head or purchase a core from 4 Piston Racing at the current market price.