System 1’s CNC-machined billet aluminum clamps are ideal for mounting filters on tubular frame rails, System 1 offers CNC machined 6061 billet aluminum clamps to attach 2” or 2-1/4” diameter filters. The 2” clamps are available to fit 1.000”, 1.125”,1.250, 1.375”, and 1.500” diameter tubing and the 2-1/4” diameter filter clamp comes only to fit 1-3/4” tubing.