The Scale Detail Engineering RR10 Bomber Overhead Headers mount between the existing shock towers by using longer hardware.
These are overhead headers like the 1:1 Bomber Fabrication KOH rig.
The "valve covers" have been hollowed out for lower cost. (old photo, new photo to come.)
We recomend the same course plastic self tapping screws that are used in other parts of the Bomber chassis.
Standard M3 machine screws work fine, just keep in mind these are not threaded.