allianceautore
August 25, 2025
Meet Ruby, a one-of-one G55 Cabriolet that started life as a 1998 G320 V6. With a supercharged 5.5L V8, six-speed manual, and 600 horsepower, this G-Wagon delivers subtle muscle and thrilling performance while remaining street-legal.
Ruby began life as a 1998 G320 V6 but has since undergone a complete transformation into a one-of-one G55 Cabriolet. This custom build delivers subtle power with show-stopping performance. From the chrome badging to the low-profile wheels, every detail is intentional.
Under the hood, Ruby packs a supercharged M113K 5.5L V8 producing 600 horsepower to all four wheels. Enhancements include a fixed supercharger pulley, larger injectors, high-flow exhaust, and custom tuning—all while retaining the factory ECU. It’s a street-legal powerhouse capable of lighting up tires with a gentle push of the throttle.
Ruby’s interior surprises enthusiasts with a six-speed manual transmission paired with three pedals, including a plush dual-disc 10.5-inch fiber clutch. The shifter utilizes a BMW 3-Series component, engineered to handle the power and torque of the V8 while remaining smooth and highly drivable—even for those with knee issues.
The cabin remains largely stock, preserving its classic look while accommodating the manual gearbox. AMG placards adorn the pedals, and minor modifications ensure a seamless integration of the shift mechanism. The interior focuses on subtlety, letting the truck’s performance speak for itself.
Ruby delivers an exhilarating drive. Cruise casually like a standard G320, or step on it to experience a tire-smoking thrill. The low stance and plane-style wheels keep the exterior tame, letting unsuspecting onlookers marvel when Ruby’s 600 horsepower comes alive.
Original Model: 1998 G320 V6 Cabriolet
Converted To: G55 AMG Cabriolet
Engine: Supercharged M113K 5.5L V8
Transmission: 6-speed manual (BMW 3-Series drag unit)
Horsepower: 600 hp
Clutch: 10.5” dual-disc fiber clutch
Mileage: 37,000 miles (truck), ~5,000 miles (conversion)
Special Features: Chrome badging, low-profile wheels, street-legal emissions, catalytic converters
Every drive is a smile-inducing adventure. Passengers often laugh and giggle the first time Ruby unleashes its full potential. This cabriolet offers a rare combination of tame appearance, smooth drivability, and jaw-dropping performance. Third-gear roll-ons even unweight the front chassis, adding to the thrill.
Ruby is currently available for purchase. It’s a unique street-legal build designed to delight enthusiasts who love performance and subtlety. For inquiries, contact Alliance Auto Care at 970-660-4429 and ask for Connor. Get ready to make your neighbors wonder and enjoy a truly unique G-Wagon experience.
Get in touch with Joe Gocher and the team at Alliance Auto Care—we’ll get your truck squared away the right way.