Want the most power for your strip or street B-series? Look no further than the RLZ Street/Strip Cylinder Head Service. These are designed for Naturally Aspirated or Forced Induction Engines running up to 850whp. Services are on your core unless otherwise stated. Services include. 5-Axis CNC Head Porting, CNC Chambers unless Stock bore or NA application , NEWEN CNC Performance Valve Job,OEM Guides Machined. CBN resurfaced. Designed for Stock Valves. Reliable for Power in the 850 WHP range. We can provide and/or install your valve train components. Please contact us for further information if needed. Once your order has been processed, a sales rep will contact you to complete the order. Price Includes to and from shipping. We will send you a UPS label.