📡 OEM Upper Manual Antenna Mounting Base Pad – Part #523666 Factory Reproduction | Precision Fit | Correct-Spec Profile Up for sale is a reproduction of the OEM upper antenna mounting base pad designed specifically for 1957–1958 Pontiac Bonneville, Star Chief, and Catalina models equipped with the manual antenna option. This pad features a 1-1/2" to 1-9/16" antenna base footprint and a 3/4" thru-hole, ensuring a precise fit for your classic GM restoration. Ideal for replacing worn or missing antenna gaskets with a factory-correct part.

📐 Fitment Compatibility

• GM Brand: Pontiac

• Models: Bonneville, Star Chief, Catalina

• Years: 1957, 1958

📦 Product Details

• Part Type: Upper Manual Antenna Mounting Base Pad

• Dimensions: 1-1/2" to 1-9/16" antenna base, 3/4" thru-hole

• Material: OEM-spec rubber or composite (verify condition if used)

• Condition: Reproduction – clean, correct profile, ready to install

⚠️ Important Notes

• Please verify fitment for your specific vehicle before purchasing

• No returns accepted on this item