Ringbrothers Unveils Billie, a Restomod GTO

The Wisconsin shop debuted an overhauled 1965 Pontiac GTO Convertible at the SEMA Show.

Updated on Nov. 3, 2026 in Performance Vehicles

Glossy blue classic muscle car with custom wheels and a low stance parked in a concrete workshop bay, with a garage door open to flat Midwestern fields. — Ringbrothers, a Wisconsin custom shop, debuted its overhauled 1965 Pontiac GTO Convertible named Billie at the SEMA Show. AI Illustration. Upload story photo >

Ringbrothers unveiled an overhauled 1965 Pontiac GTO Convertible named Billie at the SEMA Show. The car was completely stripped back and rebuilt around a Fast Track Stage III chassis from Roadster Shop.

Why it matters

The project shows how classic muscle cars can be rebuilt with modern chassis, engines, and handling components. It also reflects a personal tribute, as the car pays tribute to a GTO the owner's mother once owned.

The LT4 crate engine from Wegner Motorsports is rated at 650 horsepower and 650 pound-feet of torque, compared with 360 horsepower for the original GTO Convertible when new. The build took 5,500 hours and the body is five inches wider than the original.

The players

Ringbrothers

Ringbrothers is a Wisconsin-based custom automotive shop known for high-end restomod builds.

The details

Ringbrothers completely stripped the original GTO and built a custom body kit. The car uses a Bowler Performance 10L90E automatic transmission, Fox coilovers, six-piston Brembo brakes, and custom 19-inch front and 20-inch rear HRE wheels with Michelin Pilot Sport Cup 2 tires. The interior was crafted by Upholstery Unlimited and the paint is a custom Billie Goat Blue from BASF Glasurit.

1965: The original Pontiac GTO Convertible was manufactured.
November 3, 2026: The Billie GTO reveal was published.

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Performance Vehicle Trend

The Billie build follows the restomod approach popularized by aftermarket chassis makers like Roadster Shop, which pair classic bodies with modern suspension and drivetrains. The car is expected to drive more like a modern car than one dating back more than 60 years.

Readers interested in similar restomods should expect custom builds of this scale to cost far more than a standard classic restoration, though the extraction does not provide a price. The build shows that a classic GTO can be modernized for handling and braking performance.

The takeaway

Classic muscle cars can be rebuilt to match modern performance standards while keeping their original styling. Projects like Billie show how a personal connection to a car can drive a full rebuild.