^ I would say The Drift Spec Cage for S13 should be able to pass tech. But I dont have a D1 Rule book to look up the spec's for their requirements. With all the cage's I listed tho are greater than the requirements for Formula D in Tube sizing, and Wall thickness. Like stated in the main Description, you will most likely have to modify the door bar into a X shape to meet requirements for Formula D/ D1.
C'mon guys lets get this going!!
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