if they are for the duratec but not the correct ones they are most likely single platinum instead of double platinum, the singles dont last as long as the doubles

98.5 Black SE ATX S&B filter, SVT MAF, optimized SVT TB, mesh grille, removed orange reflectors, painted rear reflector, gutted pre-cats, optimized SVT LIM, 19lb injectors, resonator removed cant afford an svt but lookin for 1 in nc