Kleinn Air Horns GMTRK-2 Bolt-On Train Horn Kit for GM/Chevy Features a Kleinn Model 220 train horn and 1.0 gallon air tank with five 1/4" NPT ports; Chevy Shaker Bolt-On Train Horn Kit for 2007-2013 GM Trucks & SUVs Heavy duty brackets for the air system and train horns are constructed from 12-gauge mild steel and powder coated black for corrosion resistance 150 PSI rated, sealed air compressor is pre-installed, plumbed and wired into ready-to plug in harness built specifically for your 2007-2013 GM truck or SUV 150 PSI system working pressure with included 175 PSI safety valve Simple, no-drill installation using hand tools can be completed in about 30 minutes