GM 2500HD/3500HD Direct Fit Onboard Air System and 730 Train Horn

$ 2,057.95 $ 1,399.95

Model GMHD-734

2007 – 2019 GMC and Chevrolet 2500HD & 3500HD

Basic hand tools are all you’ll need to install your own direct fit heavy-duty onboard air system that features a 150 PSI high output waterproof air compressor and Model 730 Demon™ spun steel triple train horn. No drilling, cutting or making any vehicle modifications are required. Everything needed comes in one box for a professional custom designed installation.

Kit comes complete with vehicle specific, direct fit powder coated steel brackets, all necessary hardware, wiring and air line as well as a quick connect tire inflator with storage bag.



Want to add more fun and versatility to your Kleinn Train Horn System? Add the Sniper™ Wireless Remote Horn Button (P/N 333). Now you can honk your Kleinn Train Horn from up to 200 feet away. It’s a great way to find your truck in a crowded mall parking lot or prank your friends.

Ultra BlastMaster

Want it louder? Add the Ultra BlastMaster™ Valve Upgrade (P/N 6890) to your order. This kit includes two more Vortex 6 all brass solenoid valves, 12 feet of 1/2″ air line and all the necessary fittings to mount a Vortex 6 valve on all three trumpets to deliver the maximum air volume and pressure.

Installation Instructions
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to