The Mack MH Ultra-Liner, introduced in 1982, was Mack’s answer to the evolving demands of the cab-over-engine (COE) market. Designed to replace the WS Cruise-Liner, the Ultra-Liner was built with innovation and efficiency in mind, featuring a lightweight fiberglass cab reinforced with a metal frame. This combination reduced weight without sacrificing durability, a practical design for long-haul operators aiming to maximize fuel efficiency.
The Ultra-Liner came in several configurations, including the 59-inch BBC day cab and the 90-inch BBC sleeper cab, giving drivers options depending on their routes and needs. Customization was key: buyers could choose between round or square headlights, multiple interior trim levels, and various drivetrain options to tailor the truck to their specifications.
Under the hood, the Ultra-Liner delivered dependable power. Standard engine options included the Mack E6-350 4V, offering 350 horsepower, paired with Fuller T2090 or T2100 transmissions. For those looking for even more muscle, the limited-run 1984 Magnum edition boasted the Mack E9 V8, with up to 500 horsepower.
The Ultra-Liner’s cab design wasn’t just about comfort—it was practical. The layout made maintenance easier, and its streamlined aerodynamics helped improve fuel economy at a time when efficiency was becoming a higher priority for fleets and owner-operators alike.
The Ultra-Liner remained in production until 1990, marking the end of Mack’s cab-over-engine designs in North America. Over its production run, approximately 16,000 units were built, including both MH and MHR configurations.
A Little More Aerodynamic Design: The Ultra-Liner was one of Mack’s first trucks to feature aerodynamic enhancements aimed at improving fuel efficiency during the fuel-conscious 1980s.
First of Its Kind: The Ultra-Liner was one of the first Mack models to utilize lightweight fiberglass for its cab, setting a precedent for future designs.
Limited Magnum Edition: The 1984 Magnum Ultra-Liner featured the Mack E9 V8 engine with up to 500 horsepower, and only 64 units were produced, making it one of the rarest Mack trucks.
Interior Versatility: Offered in multiple trim levels, the Ultra-Liner allows drivers to select everything from upholstery materials to dash configurations, making it highly customizable.
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