SeaStar Standard Hydraulic Steering HelmHydraulic steering is a must to handle high-speed boats with high-torque engines. It enables optimal yet safe performance. As part of the steering system, the helm is made of two components- a hydraulic pump and a valve system to pump steering fluid through the hydraulic lines. As the industry leader, SeaStar helms enable steering that offers both comfort and control. Superior design, precision manufacturing, and rigid quality control from SeaStar results in an outstanding product.SeaStar Steering Helm Features and Benefits: Available in 1.7, 2.0, and 2.4 cubic inch displacements; Convenient front of dash fill; Small 3.0" hole cutout on dash; Can be retrofitted into old SeaStar 4.5" hole cutout (part number HA5418); HELM DESCRIPTION MOUNT TYPE PART NO DISPLACEMENT RELIEF VALVE SETTINGS CU.IN/REV CC/REV PSI BAR SEASTAR 1.4 FRONT HH5269 1.4 23.0 1000 70 SEASTAR 1.7 FRONT HH5271 1.7 27.8 1000 70 SEASTAR 2.0 FRONT HH5273 2.0 32.8 1000 70 SEASTAR 2.4 FRONT HH5272 2.4 39.3 1000 70 SEASTAR PRO FRONT HH5779 1.7 27.8 1500 103 SEASTAR PRO FRONT HH5770 2.0 32.8 1500 103 SEASTAR PRO FRONT HH5772 2.4 39.3 1500 103Dimensions: