I was looking on Summit's website at some plug wires. I wanted some blue wires for a colour scheme I'm going for. When looking at plugs, the had one set that looked like stock, then this set, http://www.summitracing.com/parts/tay-72610 Which have "180 degree boots". Could anyone please explain what this means? The regular set is a dollar more in price than the set with "180 degree boots", and everything else seems to be the same.