Title: AA-Racks Model X35 Truck Rack with 8 Non-Drilling

Description: Non-Drilling X35 Truck Rack with 8 C-Clamps included, NOT COMPATIBLE with trucks with Utility Track Systems. Easy Installation - Fast setup and take down when not in use. Heavy Duty Extended bolts added for extra security. Heavy Duty Securing Ratchet Straps tight on your kayak, Canoe, 16 Ft long (4 Pack), 2200 Lbs Tested, easy and safe for your transport. Ratchet Kayak and Canoe Bow and Stern Tie Down Straps Adjustable Rope Hanger (1/4' x 10', 4 pcs, 300 LBS/Pair). 2 Pair of Steel Folding Kayak J-Racks (4 racks for 2 kayaks).

Can you put 4 sets folding kayak j-racks on to hold four kayaks? - Yes

Will it fit with a spray in bed liner? - Clamps are fairly big but low profile above sight line. I have plastic bed rail covers on my F250. After mounting had “ 5/8 of of bolt extended through clamp which I thought I might need to install 1/4 rubber under for rattling. Have driven from Texas through Grand Canyon, Yosemite, and Sequoia National Forest and after 4K plus miles rack is as tight and noise free as the day I installed it.

How are the cross bars secured. There is no predrilled hole in the base and the 45mm bolts are too long. - The cross bars have set screws to lock them in place, the clamps are to hold them to the truck, there are holes in the bases I bolted mine down.

Will this fit a 2019 F350? Looking to work this with our truck and travel trailer. - Yes, it will fit any size bed. There are C clamps that go on the inside of the rail.