Yes it will fit with or without rails. But there are two different model # for the rail or no rails, I dont have any. I knew you guys would want pics, But it will be Saturday or Monday before I can get them, And I must wash the Tundra also, so the pics will show well. Im in Dusty East Texas.
Untill then check out
Extang Inc: Tonneau/Tonno, Extang Pickup Truck Bed Cover, Extang Tonneau/Tonno Covers