Keeping your accessory pulleys on your Lightning up to date is important. If your belt tensioner is wearing out, it will squeal and can wear the belt out too. Replacing these keeps your Lighting running efficiently. You can also do away with your factory A/C on your 1993-95 Lightning with an A/C delete pulley. This is a great way to free up some extra horsepower by eliminating the drag your air conditioning system puts on your accessory drive system.