The Duster was a sporty semi-fastback 2 door version of the compact sized Plymouth Valiant, built from 1970 to 1976. Built on the same platform, it shared the same front end sheet metal, but featured a different design from the cowl back. It was available in standard Duster and the performance oriented Duster 340. Standard models got the 198 or 225 cu in 6 cyl or the 318 V8 The Duster was such a success for Plymouth, that in 1971 Dodge made their own version, the Demon Valiant fender badges were deleted for 1971 and the Twister package was available on the standard model, getting the 340 look with side stripes etc but still the smaller engines. For 1972, surface mount sidemarker lights replaced the previous flush mount items Following the design changes on the Valiant models, the Duster also received a new hood, grille, front fenders, bumpers, and taillights for 1973