1987, the company introduced two different conventional highway tractors, the Model 377 and the Model 379. While more conservative than the design of the Kenworth T600, the 377 used a sloped hood (angled further than the 348/349), a standard set-back front axle, and a wraparound front bumper integrated with the front fenders (later including composite-lens headlamps). Replacing the long-running 359, the 379 served as the standard Class 8 highway tractor; sharing the 1100-series cab with the 359, the 379 was distinguished by its redesigned headlamp clusters and horizontally-mounted windshield wipers (also used on the 377). The Model 310 was redesigned, becoming the Model 320; no longer shared with Kenworth, the 320 allowed the driver to drive in a standing position. For the first time, Peterbilt entered the medium-duty (Class 5-7) market, introducing the Mid-Ranger low-cab COE. Produced in Brazil using a MAN G90 cab (a wider version of the Volkswagen LT), the Mid-Ranger was fitted with American drivetrain components; PACCAR marketed the vehicle through both Kenworth and Peterbilt. In 1988, Peterbilt introduced a second Class 8 COE, the Model 372 aerodynamically-enhanced highway tractor. Sharing its doors and internal structure with the 362, the 372 was rebodied to maximize both aerodynamics and fuel economy; the three-piece windshield was replaced by a pointed-center design. Designed as part of the cab, the roof fairing extended forward of the windshield; below the windshield, an upward-tilting shroud included the grille. While the 372 did not use a set-back front axle, the design included a wraparound front bumper; skirted body sides were available as an option. Despite its COE configuration (overcoming an inherently massive frontal area), the aerodynamic enhancements of the 372 achieved over 11mpg in real-world testing. 1990s In 1993, Peterbilt ended all operations in Newark, relocating its corporate and engineering headquarters to Denton (alongside its primary manufacturing operations). Coinciding with the consolidation, the company expanded production at the Denton facility. In 1994, the Model 372 COE ended production, with Peterbilt focusing production on the more mainstream 362. Alongside declining overall demand for COEs, the controversial exterior design of the 372 had seen a poor market response, earning nicknames "football helmet" or "Darth Vader" (among less appropriate ones). In 1996, the company closed Peterbilt Canada; the Sainte-Thérèse facility had been plagued by multiple strikes and struggled with efficiency (in comparison to the Denton and Madison facilities). In 1997, PACCAR chose to redevelop its Canadian operations,