Might be the other way around; the narrow HX & HZ Kingswood strips have the smooth black finish

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Quote Originally Posted by HK1837 View Post
HJ to HZ Kingswood are the same strips and same attachment. Only difference is HJ are smooth on the black bit, HX-HZ are textured. The only one that I can think of that didn't get the strips are HJ Kingswood XX7 or XU3.
The odd car out is HZ Kingswood SL sedan & wagon which got wider strips.