While they work, they work. However, they just don't last. For just the price of one OEM coil you can get 8 of these coils, which sounds good on paper. After about 34 months and a few thousand miles, one of them failed and started to misfire. Others also began to affect overall performance. Save yourself the hassle and get an OEM instead or you'll have to take a risk or keep replacing them when they come out. FYI I used them on a 2007 Mustang GT 4.6L V8.
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