Review on 🔊 Powerful and Versatile: Kleinn Air Horns HK2-1 Complete Dual Truck Air Horn Package in Sleek Black Finish by Edwin Black

For the shift sound I'd give them a 5, they sound really fantastic. The "special" tube of sealant they give you to thread should be discarded, just use plain teflon tape. After running the compressor every 3-5 minutes without a beep for several days, I started checking for air leaks. Even after all the fittings were redone, I put a pressure gauge on it and started taking things down. The end result is a crappy cheap little check valve. Added solid brass and it's within reason. In a letter to tech support, they said they would respond within 24 hours. Haven't heard from them. The supercharger is loud but common for little guys.