There is no need for them thats why. Standard autolite's are a 1/3 of the price and you will never notice the difference between the 2.

 

Picked up some Autolites today. I don't think Mother Nature likes this new Mustang. 40+ wind gusts. I'm afraid if I have the hood up it will just rip off the hinges. Hopefully tomorrow will bring a calmer day. Missed an open dyno day today 3 pulls for $35. But the weather hasn't cooperated the past few days so I'll just have to wait for another time