When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I have a 2016 XJL-R 5.0 and I want more horsepower than 560. What is the easiest why to do this ? What's is the most horsepower I can get out of the car?