1973 Plymouth Duster Twister

2dr Sport Coupe

8-cyl. 318cid/150hp 2bbl

#1 Concours condition#1 Concours
#2 Excellent condition#2 Excellent
#3 Good condition#3 Good

$17,200*

+20.3%
#4 Fair condition#4 Fair

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Value Graph01/2404/2407/24$5k$10k$15kOct 2024

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1970-1976 Plymouth Duster stats
Highest sale
$264,000
Lowest sale
$2,332
Most recent sale
$31,900
Sales
375

Photos

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1976 Plymouth Duster Sport Coupe
1973 Plymouth Duster 340 Sport Coupe
1971 Plymouth Duster 340 Front End
1971 Plymouth Duster 340 Rear End
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Model overview

Model description

For the 1970 model year, Plymouth designers were tasked with "muscling up" the staid Valiant. The Duster retained much of the Valiant's parts, including the chassis and floorpan, front end styling, drivetrain, suspension, and more, though it was a completely different car in most respects, with a more steeply raked windshield and a two-door fastback roofline.

The Duster came with a choice of four powerplants—two slant-sixes with either 198 or 225 cid, and two V-8s with 318 or 340 cid. Power ranged from 125 hp in the small slant-six to 275 hp in the high-performance Duster 340. That car was priced at only $400 more than the base model, but with it came a four-barrel carb, three-speed manual, heavy-duty suspension, front disc brakes, and more.

The car had officially been named the Valiant Duster, but for 1971, "Valiant" was dropped. The Duster 340 received a new "sharktooth" grille, and a Duster Twister appearance package debuted, which added Duster 340 looks to the lower models of the lineup—Rallye wheels, side stripes, the "sharktooth" grille, a flat black hood with scoops, and bucket seats.

The following year, horsepower fell across the range, as Plymouth adopted the SAE Net standard while also reducing compression on the Duster. As a result, Duster 340s were now rated at 240 hp. Dodge dropped the 198-cid slant-six, and Twister models lost their special hoods and grilles, while the Duster 340's single hood scoop was changed to a dual scoop.

A redesign came in 1973, with a refreshed front end—including bulky 5 mph federally mandated bumpers as well as new taillights. A new Space Duster trim joined the lineup alongside the Twister as well as the Gold Duster model, a decal special that first appeared in 1970. The Space Duster featured a folding rear seat and carpeted trunk, which provided increased cargo space.

Big news for 1974 was the replacement of the popular 340 V-8 with a 360 V-8, while 1975 included another restyled grille, plus another new trim—the Feather Duster—which included the 225-cid slant six and incorporated lightweight aluminum parts for reduced overall weight. The car was rated at an impressive 24 mpg in the city and 36 mpg on the highway.

In its final year, power dropped again across the range, with the Duster 360 now developing 220 hp. After more than 1.3 million Dusters had been sold, the car was discontinued, though the Duster name would live on in subsequent cars like the Volare and Sundance.

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Common Questions

The value of a 1973 Plymouth Duster Twister can vary greatly depending on its condition, mileage, options, and history. Typically, you can expect to pay around $17,200 for a 1973 Plymouth Duster Twister in good condition with average spec.

Many factors can increase a car's value including excellent condition, exceptional originality, a recent restoration, low mileage, unique provenance, desirable options, popular or unique color choices, and excellent maintenance records. Upgrades and modifications that enhance performance or aesthetics can also add value.

Factors that can decrease a car's value include unusually high mileage, poor maintenance history, visible wear and tear, accidents or damage, title issues, and gaps in ownership history. Additionally, less popular color choices and extensive modifications that don't appeal to a broad audience can reduce value.

Mileage plays a significant role in a classic car’s value. Lower mileage usually increases value because it indicates a higher degree of originality, is rarer, and suggests less wear and tear. However, cars with exceptionally low mileage may also have maintenance needs due to lack of use. Whether someone should pay more for a vehicle with lower miles will depend on how they plan on using it, and the vehicle's specific condition.

The value of modified cars differs widely based on the type and quality of modifications. While some modifications can significantly increase value, especially performance enhancements and high-quality custom work, others may not add much or could even detract from the car’s value if they appeal to only a limited audience.

All prices shown here are based on various data sources, as detailed in About Our Prices. The Hagerty Price Guide is for informational purposes only and is not intended as financial advice. More information on how forecast models are calculated can be found on Forecasted Values page. For additional information and a complete description of benefits, visit hagerty.com/legal. Purchase of insurance not required for membership in HDC. Hagerty, Hagerty Valuation Tools & Hagerty Drivers Club are registered trademarks of The Hagerty Group LLC, ©2024 The Hagerty Group, LLC. All Rights Reserved. The Hagerty Group, LLC is a wholly owned subsidiary of Hagerty, Inc.

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