Got a Steibel and split the air pump from the horn...put it under my air wing horn cover looks factory...hid the pump under the cut out behind tank.Cost me about 50.00.....pretty loud @ 125 db
I've had the Rivco horns on my '07 since 12/06 and it is a great product, and loud! People can hear me, and that's important. Eastern Performance Cycles is a good place to buy them, too.