The Single Piece Valve-Over Valve fluid end was designed by our engineers to weigh less and take up less space around the drilling rig, making it easier for in-field conversions to 7500 psi. Additionally, this design uses components that are 100% interchangeable with other manufacturers components as well as our own 2-piece fluid end design. Available for the following 1600hp and above pumps: Continental EmscoGardner DenverIdecoNationalOilwellLewcoFeatures and Benefits: Fluid energizing sealMetal-to-metal seal on valve cover2 pitch acme style threads on valve cover & liner retention systemsEngineered to reduce internal loads on valve cover and mud flow areasReplaceable liner wear plateDesigned with rear mount manifold for easy module replacement