7.4L, 8.2L BBC HO GM Vortec Marine Engine Cylinder Head. This product data sheet is originally written in English. 8.2L, 7.4L HO GM Vortec Marine Engine Cylinder Head. Replaces Mercruiser & Volvo Penta applications years 1992-newer. This is a BRAND NEW. Marine cylinder head for all 8.2L/502 & 454 HO (rectangle port) Vortec marine engines. For Rectangle port intake manifold engines. This is an OEM/GM replacement cylinder and comes complete with valves and springs. Complete with valves and springs. Replaces casting #’s: 088, 801, 934 others. Direct replacement for 8.2L marine engines years 2005-newer. 2.18/1.88 valves. Listing and template services provided by inkFrog. Replaces Mercruiser 938-8M0115141 This is a BRAND NEW marine cylinder head for all 8.2L/502 & 454 HO (rectangle port) Vortec marine engines made from 1992-newer. Specifications: Complete with valves and springs Replaces casting #’s: 088, 801, 934 others Direct replacement for 8.2L marine engines years 2005-newer 118cc 2.18/1.88 valves Listing and template services provided by inkFro. Marine Engines 4 Less. Track Page Views With.