On the front leading edge of the door glass is a flocked mylar seal that attaches to the door with two nylon H pins. This will seal the glass to the vent window frame and keeps the glass from vibrating as well inside the channel. NOS sets work much better than the reproductions, but they are now bringing $400 to $600 per pair if you can even find them. Reproductions will run you around $95.00 per pair.
At the back side of the door, there is a channel as well that the glass moves up and down in. Most people never replace this piece as most have no ideal of its purpose. Depending upon the body type, this channel is different from a hardtop to a convertible to a two door sedan. This piece will run you around $24.00 and is known as the lockside channel.
A variety of vendors stock the mylar seals, but few offer the lockside channel. We do offer both of these seals for the various year models and body styles.
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