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I GOT A SET A BBC CERAMICOATED HEADERS ON TRADE AND HAVE NO IDEA WHAT THEY FIT???THE ONLY MARKINGS ON THE ARE ON THE COLECTORS ON THE DRIVERS SIDE IT IS 104 UNDER THAT IS 10. THE PASSENGER SIDE HAS 1103 WITH A 110 BELOW IT. ANY HELP IS APPRECIATED. I NEED A SET FOR MY CHEVELLE AND WOULD LIKE TO KNOW IF THEY WILL FIT.