At the heart of the Invadr lies a highly tuned 3.8-liter twin-turbo V-6 engine, sourced from Duttweiler Performance, a name synonymous with ultra-high-horsepower builds. Producing a staggering 1,246 horsepower and 1,000 lb-ft of torque at 32 psi of boost, the Invadr’s engine eclipses the original Grand National’s output by over 1,000 horsepower. Even more impressive, with the turbos cranked up to 50 psi, this powerplant can deliver a jaw-dropping 2,000 horsepower.

Ringbrothers co-owner Mike Ring has described the Invadr as potentially their fastest build to date. Given its specs, it's hard to disagree. All this power is routed through a Tremec T56 six-speed manual transmission to a modified Ford 9-inch rear end, ensuring a raw and thrilling driving experience.

The Invadr’s performance isn’t just about brute force. Beneath its muscular exterior lies a custom chassis from Roadster Shop, designed to handle the immense power with finesse. The suspension features three-way adjustable Penske shocks for optimal handling, while massive Michelin Pilot Sport Cup 2 tires on custom HRE wheels provide ample grip. Stopping power is delivered by carbon-ceramic brakes sourced from a C6 Corvette ZR1, ensuring the Invadr can decelerate as quickly as it accelerates.

Ringbrothers’ hallmark attention to detail shines through in the Invadr’s exterior design. While retaining the Grand National’s iconic aesthetic, subtle tweaks elevate its visual appeal. The front and rear bumpers have been replaced with custom stainless steel pieces, while the front fenders and side skirts have been subtly reshaped. Carbon-fiber accents, including a hood vent and rear spoiler, add a modern touch. Completing the look is a paint color called "Dark Vader Gray," a nod to the original Grand National’s all-black persona.

Step inside, and the Invadr reveals a blend of luxury and track-ready functionality. Carbon fiber dominates the cabin, from the dash to the custom trim. A roll cage adds structural rigidity, while a button for a parachute hints at the car’s drag-racing potential. Every detail has been meticulously crafted, ensuring the interior is as breathtaking as the rest of the car.

The 1987 Buick Grand National was a landmark vehicle, showcasing that a turbocharged V-6 could rival traditional V-8s in performance. Its stealthy all-black design and innovative engineering earned it a cult following. With the Invadr, Ringbrothers pays homage to this legacy while pushing the boundaries of what’s possible in a restomod.

Ringbrothers invested an astounding 4,900 hours into this build, and the result is nothing short of spectacular. The Invadr isn’t just a car; it’s a work of art, a testament to the craftsmanship and ingenuity that have made Ringbrothers a standout name in the automotive world.

For enthusiasts at SEMA 2024, the Invadr is more than a showstopper; it’s a symbol of what happens when cutting-edge engineering meets a deep respect for automotive history. Whether on the road or the track, the Invadr is poised to redefine what a modern muscle car can be.