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6. Tube front bumpers OK. 1 3⁄4′′ .095 maximum size tubing used. Must be turned backed and capped, must fit under nose piece. Aluminum bumper O.K. Front and rear bumpers must be mounted at. approximately stock height and location. Bumper height measured from ground to centerline of bumper. must be a minimum of 16′′ and a maximum of 20 ................
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