Hostile03SVT, yes it does improve performance on any modified Lightning. The reason it is up for sale is I sold my Lightning a couple of days ago and I removed it , as the customer who bought the vehicle did not want to pay me for some of the modifications installed onto the vehicle. Hope this helps, as this will make someone a good mod, at a good price, including a Brand New K&N Filter.Hostile03SVT said:why are you selling this? isnt it suppose to improve the performance of our trucks or not enough to even bother??