newly designed tubular frame steel chassis and a 3.0 liter 308 Quattrovalvole engine. This engine was mounted longitudinally in a rear-mid-engine position, in contrast to the transverse mounting of the 308 road cars and the earlier Gr.4 rally cars. The engine was upgraded internally and used an equal-length exhaust system and modified Bosch Kugelfischer fuel injection. This engine produced approx 363-370 bhp at 8900 rpm. Upgraded pistons, valves and camshafts were used and both the camshaft and belt covers were cast in lightweight magnesium alloy. A Hewland 5-speed manual transaxle was mounted at the rear and supplied power to the rear wheels only. The car was also fitted with a dual-plate, Formula-One type Borg & Beck clutch. Double wishbone suspension and coil springs were used at all four wheels, with suspension geometry based on the Ferrari Mondial. Some standard 308 and Mondial components were incorporated, although many were modified. The suspension arms and steering rack both had two alternative mounting positions to allow ride height adjustments. Brembo brakes were fitted, including a hydraulically-operated handbrake. The Kevlar and carbon fiber body of the car was designed by Francesco Boniolo. It resembled the earlier Ferrari 512 BB/LM and was influenced by wind tunnel testing of that model. It incorporated large, fixed headlights and a prominent rear spoiler. The body was constructed by Carrozzeria Auto Sport near Modena. Total weight of the car was , 120 kg less than the minimum weight mandated by Group B rules. Ferrari drivers extensively tested the 308 GT/M at Fiorano from 1984 to 1986. With racing tires fitted, the 308 GT/M lapped Fiorano in 1 minute, 24.6 seconds, faster than both the F40 (1:25) and 512 BB/LM (1:26.6). The car accelerated from 0- in less than 4 seconds. Ferrari designed the car to reach a top speed of at a 8500 rpm redline in 5th gear. Three 308 GT/M chassis were constructed, numbered 001, 002 and 003. Chassis 001 was completed in 1984 and subsequently used as a test mule by Ferrari to develop the design, including extensive track testing at Fiorano Circuit. By June 1984, it was sold to Belgian driver Jean "Beurlys" Blaton. Blaton raced the car occasionally in local Belgian rallies. Chassis 002 was entered in the 1984 Rally di Monza, where it was driven by Raffaele "Lele" Pinto. Under wet conditions, Pinto damaged the rear suspension and finished 4th, trailing a "conventional" Gr.B