Design for others, engineering, consultation, and sales services in the field of components and accessories for marine engines and for boats, all provided to manufacturers and custom producers of marine engines and boats, namely, providing collections of preselected components and accessories for a specific boat to be built or for a specific boat model to be built, where such marine engine and boat components and accessories are namely, boat headers, stainless-steel blower intake manifolds, custom-built 180-degree headers, exhaust headers; propellers for boats; outdrives for boats, namely, stand-off boxes, outdrive spacers, lower units, gimbals, shafts, bearings, gears, and drive showers, gas tanks for boats; steering units and throttle controls for boats; trim tabs as vehicle parts, namely, electric trim tabs, hydraulic trim tabs, tab indicators, and hydraulic pumps; engines for boats; instrumentation, namely, electric navigation instruments; gauges, namely, speedometers, tachometers, oil pressure meters, water temperature meters, pyrometers, fuel flow meters, fuel gauges, trim tab indicators, out drive trim indicators, depth gauges, amp meters, and exhaust temperature meters