Defiant! ~ 1,100HP 1972 AMC Javelin AMX Custom Muscle Car

1972 AMC Javelin AMX
Defiant ~ 1,100HP 1972 AMC Javelin AMX Custom Muscle Car

This 1972 AMC Javelin ~ named “Defiant!” ~ is arguably the wildest custom vehicle design ever built by the Ringbrothers.

When Prestone approached Ringbrothers about the idea of building them a vehicle, the Rings already had a canvas in mind – a 1972 Javelin AMX that had been rolling around their home town for over four decades.

With an extremely compressed 12 month timeline, they decided to rely heavily on Solidworks digital design tools to render the car’s new panels, which were then brought to life in their machine shop and carbon fiber facility.

They extended the Javelin’s wheelbase by moving the wheels forward six and a half inches. The car’s distinctive wheel arches were moved forward and recreated in carbon fiber to pair with a new hood, front fenders, grille and front valance.

Other custom details include tail lights, bumpers, trim and engine bay accessories all machined out of blocks of aluminum at the Ringbrothers facility.

To finish the look of the car and highlight the body work, the exterior of Defiant is coated in a rich BASF Glasurit 55 Line “Jalop Gold”


The guys got their hands on the Prestone 1972 AMC Javelin AMX, and they put its 1000+hp to good use…

1972 AMC Javelin Custom Muscle Car Build Specifications


Engine: Wegner Motorsports Inc. 6.2 Liter Hemi Hellcat Mopar Crate Motor (1,036 HP)

Forced Induction: Whipple 4.5 Liter Supercharger

Engine Extras: Holley Dominator Fuel Management System

Transmission: Chevy 4L80E Automatic by Bowler Transmissions (good to 1,600 HP)

Drive Shaft: QA1 Carbon Fiber Driveshaft


Chassis & Front Suspension: Detroit Speed Hydro Formed Front Sub for a Camaro Set Up

Rear Suspension: 4-Link custom by Ringbrothers

Shock Manufacturer: RideTech

Front Sway Bars: Detroit Speed

Rear End: Chevy 12-bolt


Exhaust Manufacturer: Flowmaster 44 Stainless Steel

Header Details: Customized by Ringbrothers


Radiator: Stock Hellcat Radiator and Fan Assembly

Fluids: Prestone Anti-Freeze


Type: Rack & Pinion

Manufacturer: Detroit Speed

Steering Column: Ididit

Fluid: Prestone

Wheels and Tires

Wheel Manufacturer/Model: HRE Performance Wheels

Front Wheel Size: 20” x 11”

Rear Wheel Size: 20” x 13”

Tire Manufacturer/Model: Michelin

Front Tire Size: 285/30/20

Rear Tire Size: 335/30/20


Front Manufacturer: Baer

Front Caliper Specs: 6S 6-Piston

Rear Manufacturer: Baer

Rear Caliper Specs: 6S 6-Piston


Fuel Type: 92 Octane

Fuel Pump: Aeromotive

Fuel Tank/Cell: Aeromotive

Fuel Management: Holley Dominator Fuel Management System


Wiring Harness: Painless Wiring


Paint Manufacturer: BASF Glasurit Waterborne

Paint Color: Jalop Gold

Paint Booth: Global Finishing Solutions


Seats: Custom by Upholstery Unlimited

Gauges: Classic Instruments

A/C System: Vintage Air Gen IV Magnum Evap Kit

Stereo System: Kicker

Built by: RINGBROTHERS ~ E4829 US Highway 14 Spring Green, WI 53588