You are bidding on a set of (8) NEW Champion RF9YC Copper Plus spark plugs still sealed in the original cellophane and packed in the original 8 count Champion box as shown in the photo.  We have a large quantity of these available.  Note that your bid is for a set of 8, if you want more than one set, just enter the quantity in the BIN field.  This is the correct plug for many cars and trucks, including AC/Shelby Cobras with the 427/428, Ford Mustangs with the 289/428, etc  Be sure to check to verify this is correct for your application before purchasing.

Specs: 18mm thread, 0.429" thread reach, 13/16" (21mm) hex, non-removable nut terminal and tapered seat type.  This is a resistor plug.  Heat range is 9.  Nickel copper alloy electrodes.

Headquartered in the USA, Vintage Electron Inc. primarily specializes in vintage electrical and electronic items such as electron/vacuum tubes, spark plugs, etc.  Depending on the lots we purchase, we may also list other items such as vintage auto and truck parts, literature, etc.  Search our store if you are curious what we have on offer this week.  Thanks for looking at our listing. (HWH-9)