- Ringbrothers transformed a 1987 Grand National with a twin-turbo V6 pushing 1,246 hp and 1,000 lb-ft of torque.
- This custom muscle car features a Roadster Shop chassis, Penske shocks, and Brembo carbon-ceramic brakes.
- Inside, upgrades include a roll cage, custom gauges, and a parachute release for high-speed drag strip runs.
The Buick Grand National has long held a special status among American performance cars. Even in its original 1987 guise, it was an intimidating machine, but nothing quite as unhinged as this wildly reimagined version from Ringbrothers. Unveiled at the SEMA Show in Las Vegas, this radical build might just be the most outrageous Grand National the world has ever seen.
When it was launched, the Grand National put performance cars on notice with its turbocharged V6. Ringbrothers could have easily forgotten about the car’s heritage and installed a big-capacity V8, but it hasn’t. Instead, they stayed true to the spirit of the car, albeit with a sinister twist.
This restomod, named Invadr, packs a twin-turbo 3.8-liter V6 built by Duttweiler Performance, generating a mind-bending 1,246 horsepower and 1,000 lb-ft (1,355 Nm) of torque—figures that make the original model’s modest 240 hp look almost laughable.
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This powerhouse of an engine features two 62 mm turbochargers, a billet crankshaft, and custom hand-ported aluminum cylinders. It works alongside a Tremec T-56 Magnum six-speed transmission to drive the rear wheels.
Ringbrothers didn’t just ditch the car’s original V6 but has also replaced the chassis with a new one from Roadster Shop. Three-way adjustable Penske shocks have been added, and the wild creation even features air jacks. All of the car’s wiring had to be redone, it now rocks a new fuel cell, and has the same Brembo front and rear brake calipers and carbon ceramic discs as the C6-generation Corvette ZR1.
Visually, the shop hasn’t messed around too much with the Grand National’s classic looks, though subtle upgrades hint at the car’s capabilities. New three-piece HRE wheels—19-inch up front and 20-inch at the back—wrapped in Michelin Pilot Sport Cup 2 tires provide both grip and style. A custom chin spoiler, slightly flared rear quarter panels, and a carbon fiber hood scoop add a modern, aggressive touch without diluting the car’s original aesthetic.
One look inside the cabin shows this thing means business. A roll cage dominates the interior, complemented by custom gauges, a new steering wheel, and a Vintage Air climate control system.
For those brave enough to push Invadr to its limits, there’s even a parachute release button on standby—a fitting addition for a car with this level of raw power, tailor-made for a showdown at the drag strip.
