The legs of the sport bar that are closest to the back of the cab or back window, simply mount into the existing Stake Holes on the bed rail However, the legs of the sport bar that are further back, about halfway point on the bed, these require drilling 2 holes, about 1/2 inch diameter each, on both sides of the Top Bed Rails, so 4 holes total - thru the plastic cover. If you feel on the under side of your bed rails you should find these holes already there stamped into the metal part of your bed rail from the factory. But you will have to drill thru the plastic cover on the top of the rail.
The other thing, this Sport Bar will require you to go to the dealership to delete the Rear Top Mounted Brake Light on the top of your Cab, to render it inoperable. Then you'll need to buy a wiring harness that connects to your fuse box and goes under the truck, to the Sport Bar. The Sport Bar will be the new Rear Top Mounted Brake Light. The Wiring Harness is $150. The Labor for doing the wiring delete and installing to connect to your Sport Bar is $200-300. The Sport Bar is $695. So Long story short, this is a $1,000 "Option Package" and this almost no way around it. Open your wallet.
Now here is the part you didn't ask, and I sincerely don't want to hurt anyone's feelings on the forum, but I just have to say - It's not worth it. I am so happy that I removed this from my truck. I get that beauty is in the eye of the beholder, some will love it and that's fine too. I think the Sport Bar makes the truck into an SUV, just consider if that is the look you are tansitioning from Truck to SUV. Some may want that, but I wanted a Truck. I really really like the aesthetics without it.