Bosch +4 are a waste of money..I tried them on my SVt and i got iradic idle.....I thought it was my wires and got ford racing, nope....so i went to motorcraft double plats! Best [censored] i ever bought......Also on the denso and NGK's.........Both of my reps for my work say they are a waste of money...on our ignition systems they dont fire properly....this is comming from my direct rep at both manufaturers....so comming form the horses mouth, i'll take that info over risking my cars health, any day!
Roz
