Ringbrothers is back at SEMA with a customized 1965 Pontiac, featuring carbon-fiber bodywork and an LT4 supercharged V-8 engine.

The 2026 SEMA show opened today, celebrating the unbridled imagination of the custom car scene, and, of course, Wisconsin-based Ringbrothers has returned with yet another exquisite creation. This year’s showpiece is a 1965 Pontiac GTO convertible dubbed “Billie,” which enhances the classic muscle car’s assertive styling and packs it with modern power.

Ringbrothers built Billie for a customer who wanted to pay tribute to a GTO his mother once owned. The client originally proposed the name “Goat,” with Ringbrothers suggesting Billie (as in billy goat), a more playful take on the iconic Pontiac’s long-held nickname.

Despite presenting as a GTO, Billie originally started life as a 1965 Pontiac Tempest, before Ringbrothers went to work, widening the body by five inches, reshaping the front fenders, lengthening the rocker panels, and adding carbon-fiber doors. The hood is also fashioned from carbon fiber and wears billet-aluminum inserts and an enlarged scoop to feed air to the engine.

That engine is a Chevy’s LT4 supercharged 6.2-liter V-8, cranking out 650 horsepower and 650 pound-feet of torque and hooked up to a Bowler Performance 10-speed automatic transmission. The body is placed atop a Roadster Shop Fast Track Stage III chassis, and Billie also features Fox coil-over springs and six-piston Brembo brakes. The staggered HRE G-Code wheels, measuring 19 inches up front and 20 inches at the rear, are shod in Michelin Pilot Sport Cup 2 rubber.

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