Perfect fit for my wife's 2008 FJ Cruiser. Total installation time was about 40 minutes. I don't know what that little yellow cap is for, but it goes all the way to the steering box so it doesn't leak while the rest of the line has been removed. I think that's what it was meant for. After the new line was in place, I removed the yellow cover, fitted the line to the gearbox and tightened the clamp. Once the line was installed it fixed the leak FJ was having.