lifetime warranty really doesnt mean much, its a “ownership duration” warranty, meaning once the vehicle changes hands (ownership) the warranty isn’t valid. Its a marketing scheme, the thought behind it is that the vehicle went (for example) 60,000 miles on the last set of parts (weather its brakes, plug wires, alternator) and they are banking on the fact that by the next time it needs a certain part replaced it will be owned by someone else or you will have forgot it was a “lifetime “ part. Sure, some of us keep a car/truck for a really long time but some dont, I dont recall if my failed plug wires were lifetime, but since that set was crap, I sure didnt want another set of the same thing.