What is the difference between gm 4 pin ignition modules tp45 and tp45sb ? Have Dave Ray built dist in my suncoupe and changed the module out with the sb one and I see he calls for tp45 as a replacement. Thanks for any input as I can’t really find any answers on the web.
Manufacturer part number. From what I see, they are identical. NAPA links, https://www.napaonline.com/en/p/ECHTP45 https://www.napaonline.com/en/p/MPETP45SB Just different product lines, Echlin being more expensive.