The Grand National Experimental was created in partnership with McLaren Performance Technologies/ASC to celebrate the end of the vehicle’s production run, and all 547 examples were finished in black. Cosmetic details specific to the GNX include heat-extracting fender vents, composite wheel arch flares, a three-piece rear spoiler, and GNX badging. Additional exterior details include an automatic power antenna, a rear window defogger, sport mirrors, and dual exhaust outlets.
Black 16″ cross-lace wheels are mounted with Goodyear Eagle VR50…
The Grand National Experimental was created in partnership with McLaren Performance Technologies/ASC to celebrate the end of the vehicle’s production run, and all 547 examples were finished in black. Cosmetic details specific to the GNX include heat-extracting fender vents, composite wheel arch flares, a three-piece rear spoiler, and GNX badging. Additional exterior details include an automatic power antenna, a rear window defogger, sport mirrors, and dual exhaust outlets.
Black 16″ cross-lace wheels are mounted with Goodyear Eagle VR50 tires. The GNX features front suspension components from the contemporary Grand National, and upgraded rear components include a Panhard rod, torque arm, and an additional frame cross member. Braking is handled by power-assisted front discs and rear drums.
The cabin features front bucket seats and a rear bench upholstered in black and Sand Grey cloth, with Turbo 6 embroidery on the front seat headrests. Additional amenities include a power-adjustable driver’s seat, air conditioning, cruise control, power windows, and a Delco cassette stereo. A plaque mounted to the passenger side of the dashboard identifies this as GNX #217. The headliner is a replacement.
The three-spoke leather-wrapped steering wheel fronts GNX-specific Stewart-Warner instrumentation consisting of 160-mph speedometer, an 8k-rpm tachometer, and gauges for boost, oil pressure, coolant temperature, and fuel level. The five-digit odometer shows 2,300 miles.
The 3.8-liter V6 was modified by ASC/McLaren with a Garrett T3 turbocharger under a heat shield with GNX lettering along with a larger air-to-air intercooler and a low-restriction exhaust system. Factory-rated output was 276 horsepower and 360 lb-ft of torque. The fuel injectors were replaced in July 2021.
Power is sent to the rear wheels through a Turbo-Hydramatic 200R4 four-speed automatic transmission with a factory-upgraded oil cooler and a limited-slip differential that features a GNX-branded aluminum rear cover.