BMR Suspension TAS003 - Manual (Page 5)

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24. The recommended (and easiest) way to drill through the frame rails is with a step type
drill bit. Using a ½” bit (or step bit) drill through the outer portion of the frame rail as
shown in Image 13. Take extra care to angle the drill correctly before drilling through
the other side of the frame rail. Continue drilling through the frame rail until the bit starts
to appear through the inner bolt holes of the BMR cross-member. In most cases, the
holes in the cross-member will “self-align” the drill bit, forcing the bit to center itself in
the hole.
25. Once both ½” holes are drilled through the sub frame, it is necessary to enlarge the outer
frame holes to ¾” to allow insertion of the provided frame reinforcement inserts. Using
either a ¾” drill bit or a step bit (much easier), enlarge ONLY the outer holes in the frame
rail. (Image 14)
26. Assemble the outer reinforcement plate, frame inserts, and ½” x 3” bolts with stainless
washers as shown in Image 15. Slide the assembly through the subframe until the bolts
protrude through the BMR cross-member on the inside of the frame rail. Thread a nut
and stainless washer onto the exposed portion of the bolts and then tighten to 80 ft/lbs.
27. Duplicate steps 21-26 for the other side of the vehicle.