You must be logged in and verified to contact the designer.
V4 is the same dimensions as the original & has a built in cargo rack & mount for an RC4WD hi-lift jack
Roll cage for the ever popular china 2drJK body, it mounts in the same spots that the factory hard top does when you take it off.
Here's the hardware sizes needed to mount it.
Front(over the windshield):
2.5x6mm(outside where the the factory hardtop mounts)
2.5x16mm cap head screw & washer
2.5x12mm cap head screw & washer