1972 AMC Javelin AMX Defiant!

“Defiant!” is arguably the wildest custom vehicle design ever crafted by the Wisconsin based car builders thanks to its extreme appearance, cutting-edge construction techniques and four-digit power output.

When Prestone approached Ringbrothers about the idea of building them a vehicle, the Rings already had a canvas in mind – a 1972 Javelin that had been rolling around their home town for over four decades. With an extremely compressed 12 month timeline, the duo 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.

The Rings 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.

“Defiant!” is powered by a Wegner Motorsports 6.2-liter Hemi Mopar Hellcat engine fitted with a Whipple 4.5-liter Supercharger that produces a mind-boggling 1,036 horsepower. A Bowler automatic transmission backs the high-powered engine and a sturdy QA1 Carbon Fiber driveshaft transfers power to the wheels. Royal Purple engine and transmission oil assures the high-powered motor will be kept running smoothly, while a new Dodge Hellcat radiator and fan assembly ensures perfect running temperatures when filled with Prestone Antifreeze. Other engine highlights include a Holley Dominator fuel management system and wiring harness from Painless Wiring. The Javelin’s growl is audible via custom stainless steel Flowmaster headers and exhaust.

The newly extended wheelbase is supported by a Detroit Speed Hydroformed front subframe originally engineered for a Camaro. The Rings installed Detroit Speed rack and pinion steering, as well as front sway bars and RideTech shocks for a smooth ride. The front suspension is complemented by a Chevy 12-bolt rear end fitted with a custom four-link suspension built by the Rings.

Key interior features include a Kicker sound system, Classic Instruments gauges, a Vintage Air Gen IV Magnum Evap Kit and custom seats by Upholstery Unlimited. “Defiant!” rolls on a set of HRE Performance Wheels sized at 20x11 in the front and 20x13 in the rear, all wrapped in Michelin tires sized 285/30/20 up front and 335/30/20 out back. With more than 1,000hp on tap, the Javelin requires massive stopping power, so a set of six-piston caliber Baer brakes are installed to bring the car to a stop.

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

Vehicle Specs


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


Corporate Sponsors




Royal Purple


Product Sponsors


ARP – Automotive Racing Products

Baer Brakes

Bowler Transmission


GFS – Global Finishing Solutions

Heat Shield Products


HRE Performance Wheels


Miller Welding


Painless Wiring


Whipple Superchargers

Ringbrothers Proud Sponsors:

  • 3M
  •  Hurst
  • Flowmaster
  • B&M
  • BASF
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  • Prestone