Porsche 964 Turbo Flachbau

All were equipped with the “Works Increased Horsepower” X88 engine option which was based on the 3.6 Turbo B2 engine built by Andial for the IMSA Bridgestone Supercar Championship. It incorporated a larger, single K27 turbocharger, an upgraded intercooler, modified cylinder heads with larger ports, higher output fuel injectors, and more aggressive camshafts. The M64/50 X88 were stamped with a unique “S” on the engine case that is about twice the size of the engine numbers. The X88-equipped engines delivered 385 horsepower at 5,750 rpm, approximately 25 more horsepower than that of the standard 3.6 Turbo. Torque rose to 384 pound-feet at 5,000 rpms. All were equipped with a stronger flywheel and clutch package to handle the extra power and torque. The G50 five-speed manual transaxle was equipped with a ZF limited-slip differential with 20 percent lockup under acceleration and 100 percent under deceleration.
These cars were all fitted with standard 3.6 Turbo suspension, including 21-millimeter anti-roll bars at the front and 22-millimeter at the rear, and Boge shocks and struts. The ride height was lowered by about an inch and a half to enhance handling at the suggestion of racer/engineer Roland Kussmaul.

All of the X83 examples were sent directly to Porsche’s Japanese distributor of that period, MIZWA Limited in Tokyo, which added special Japanese-language safety and emissions-equipment labeling on the interior’s left-side armrest and in the engine compartment.

This example was imported to the U.S. under the US DOT “Show and Display” license issued on May 2, 2014. It includes all of its original documentation and the owner’s manual and warranty books in both German and Japanese. Also included are the correct spare wheel and collapsable Vredstein spare tire, tire pressure gauge, roadside emergency kit with warning light, and a pair of special tri-color MIWZA work gloves. Since being imported to the U.S., it has been regularly driven and serviced at a private motorsport facility to ensure that all systems are operating correctly and remain in excellent mechanical condition. Upon arrival to Road Scholars, it was thoroughly inspected and is in exceptional condition both inside and out.

With just 10 X83 examples produced for the Japanese market, this example is one of the rarest production 964 models in existence and would be an excellent addition to any Porsche collection.