Installing the Thule AeroBlade Edge Roof Rack, # TH7602-TH7603, and Thule Fit Kit for Podium Style Foot Pack, # THKIT3112, will increase the height of your 2013 Land Rover LR4 approximately 3 inches.
As you stated, the Thule Motion XT Alpine Rooftop Cargo Box, # TH629506, measures 12-1/4 inches at it's tallest point from the top of the crossbars. This cargo box combined with the roof rack system will add approximately 15-1/4 inches to the height of your LR4. view full answer...
The Curt # 13942 has the following bolt hole to bolt hole measurements.
The bolt hole closest to engine and middle hole- 34-3/4" apart center on center.
The bolt hole closest to the rear of the truck- 34-1/8" apart center on center.
I've also linked an image with these dimensions. view full answer...
I called my contact at Thule and he said that the measurement from the top mounting point of your factory rails to the bottom of the Thule WingBar Evo Crossbars # TH711420 is about 3-1/2 inches. This measurement includes the Rapid Podium Feet for Thule Crossbars # TH460R and the Fit Kit for Thule Podium-Style Roof Rack Feet # THKIT3112. view full answer...
From where the Thule Aeroblade Edge Roof Rack part numbers # TH7602B-TH7603B and # THKIT3112 will install on your vehicle they will add right at an additional 2-1/2 inches of height to the vehicle.
I attached a picture that shows this dimension. view full answer...