The Back Glass Gasket Lockstrip – Black is an OE-style rear window weatherstrip component designed for 1970–1976 Plymouth Duster, 1971–1972 Dodge Demon, and 1973–1976 Dodge Dart Sport models. This lockstrip installs into the rear window gasket channel, securing the back glass firmly in place while restoring the factory-correct finished appearance around the rear window opening.
From the factory, Chrysler A-Body vehicles utilized a lockstrip-style rear window gasket system. The lockstrip expands the gasket once installed, helping retain the glass securely within the body channel. Over time, original lockstrips often become brittle, faded, cracked, or shrunken due to age and UV exposure. When deteriorated, the rear window gasket may not seal properly, and the exterior trim line can appear uneven or incomplete. Replacing the lockstrip restores proper gasket tension and clean factory styling.
Manufactured as an OE-style reproduction, this black lockstrip matches original dimensions, profile, and flexibility used on 1970–1976 A-Body fastback models. The correct black finish delivers the factory appearance expected in a stock restoration. Accurate fit ensures proper engagement within the rear glass gasket channel, maintaining consistent pressure around the back window perimeter.
This lockstrip is ideal for classic Mopar restoration projects, rear window service, or replacing aged components during bodywork and repainting. It complements original-style rear window gaskets and supports factory-correct glass retention.
Offered as X-Parts by Auto Metal Direct, this back glass gasket lockstrip is a third-party OE-style replacement selected to meet AMD’s standards for fit and application accuracy.
Auto Metal Direct is a team of true car guys with years of experience in sheet metal reproduction, car restoration and paint/body work. We believe that quality is not subjective! Our mission is to provide the best customer experience for the Ford, Mopar and GM classic car markets - both in products and in service.
Our panels are made from proper gauge steel and include all correct-as-original clips, tabs, flanges, bends and seams. Each time a prototype body panel comes off of a new tooling, we test fit it on a car. The marked up prototype is then used to change and improve the tools, and a new prototype is produced. This procedure might be repeated multiple times but, once the part is finally approved, you can be assured of a quality part.
| Make | Model | Submodel | Years |
| Dodge | Dart | Demon 340 | 1971 - 1972 |
| Dodge | Dart | Sport | 1973 - 1976 |
| Plymouth | Duster | 1970 - 1976 |
| Brand | Precision |
| Height | 7 in |
| Length | 7 in |
| Weight | 1 lbs |
| Width | 7 in |
