I did two compressor/tank and air horn installations, one with all the air fittings and a small black hose and the other with regular air hose, barbed fittings and hose clamps. The latter has proven to be much better, this small hose is difficult to manage, especially in tight spots. I will replace mine over time. I'm giving it one star because the switch/relay sucks. The only benefit I see with this hose is that you can drill a small hole in the firewall for the pressure gauge, but if Viairβ¦