The last 2018 Dodge Challenger SRT Demon, assembled at the FCA U.S. Brampton Assembly Plant (Ontario, Canada), rolled off the line on Wednesday, May 30, in the first step toward making horsepower history at the June 20-23 Barrett-Jackson Northeast Auction.

The limited-production, world record-setting 2018 Demon and the last 2017 Dodge Viper hand-built American supercar will be auctioned as a pair in the Ultimate Last Chance end-of-an-era offer with 100 per cent of the hammer proceeds from the sale going to the United Way.

After leaving the Brampton plant, the last 2018 Dodge Challenger SRT Demon will travel to an upfit centre for its final stages of assembly, which includes adding a hand-painted exclusive Viper red exterior colour, 18-inch aluminum wheels, 18-inch Demon drag radial tires, Demon vehicle badging and a one-of-a-kind VIN instrument panel badging.

Production of the Challenger SRT Demon was limited to one model year and 3,300 units.

The winning bidder at the June 20-23 Barrett-Jackson Northeast Auction, held at the Mohegan Sun Resort in Uncasville, Connecticut, takes home a combined 1,485 horsepower: the 840-horsepower Dodge Challenger SRT Demon — the industry’s first and only purpose-built, street-legal production drag car with the most powerful production V-8 engine and 20-plus industry-first, drag-performance features — and the 645-horsepower Dodge Viper with an 8.4 L V-10 engine, aerospace-grade lightweight carbon fibre body, iconic side exhaust and massive 14-inch wide rear tires.

Additional details on this once-in-a-lifetime Dodge Challenger SRT Demon/Dodge Viper Barrett-Jackson auction lot are available at DodgeGarage.com.

Leaving behind a 25-year legacy with more track records than any other production car, production of the V-10-powered Dodge Viper concluded at the Conner Avenue Assembly Plant in Detroit in August 2017.

The last production 2017 Dodge Viper is styled in homage to the first-generation Dodge Viper RT/10 with its Viper red exterior and black interior. The car (VIN ending in 731948) includes exterior carbon fibre accents, black Alcantara leather seats and an exclusive VIN instrument panel badge and authentication kit.

Dodge/SRT and Barrett-Jackson have collaborated before with charity as the winner. A one-of-a-kind 2015 Dodge Challenger SRT Hellcat, VIN0001, raised $1.65 million for charity in 2014 — at the time more than any other car in Barrett-Jackson history.