Bought these to replace the factory ones which were a thing of the past on my 2011 F150. MSD used to be a good company, but these coils are complete junk. I've ridden less than 5,000 miles with these coils and already had 2 of them fail. I only use 91 octane gas and drive on the freeway to get to work. I will return these pieces of junk for a refund and buy a factory motorcycle part. Just buy motorcraft DG549. They're $50 on Amazon and come with free shipping.
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