4" to 4 1/2" wheel adapters

1963dartgt said

Transdapt still makes them.
Trans-Dapt Performance Universal 5-Lug Wheel Adapters 7066

Click to expand...

Those are cast aluminum with not enough metal supporting the studs. They have been known to crack at the studs even when tightened properly. Billet for adaptors or don't bother.

Dodge Dart Plymouth Barracuda Duster Valiant 5x4 to 5x4.5 Wheel Adapters 1 Inch | eBay