14mm threaded long reach. Made by Champion. Used with 21mm spark plug socket. Stock resistor replacement spark plugs for S&S engines. Endorsed by S&S Cycle Inc. to be used in all S&S engines and stock H-D engines. Heat range is correct for all S&S engines. All S&S engines with 14mm threaded spark plugs 75-99 B.T.(excl. Twin Cam) 72-85 XL (NU)
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All S&S engines with 14mm threaded spark plugs; 75-99 B.T.(excl. Twin Cam); 72-85 XL (NU)