Model 821-858
Giant® Pro
Low Tone 285 Hz / 130 Decibel Lanyard Valve Operated

The GIANT PRO produces a powerful truck horn sound, utilizing a heavy-duty Lanyard to
activate the horn. All metal construction, chrome plated throughout to withstand the extremes
in all weather conditions and to provide years of dependable service. Provided with the horn is
a metal front pedestal support that is chrome plated. The support bracket will help to eliminate
trumpet vibration at high speeds and on the roughest roads. A front deflector cover provides
protection against rain, road dirt, snow, and bugs from entering the horn’s trumpet, protecting
the sound and your investment. The air feeder hose connection is made through the base of
the horn and is not externally visible. Installation of the high-pressure air lines is made easy
with Wolo’s flexible inlet hose with brass fittings. The GIANT PRO has a beautiful bright chrome
appearance that will look great on any truck, big or small, providing an alerting sound THAT
WILL BE HEARD!
The on-board air system provided is designed to produce a large volume of high-pressure air
to power the GIANT PRO TRAIN HORN and includes everything necessary for a professional
installation. The compressor has a heavy-duty 12-volt motor that is balanced to precision.
There are 4 heavy rubber bushings mounted into the compressor base plate to virtually
eliminate vibration. For surface mounting of the compressor, there is an extended length
stainless steel high-pressure hose that connects the compressor to the 2.5-gallon metal
air storage tank. Other features of the GIANT PRO includes; an air storage tank that has
a built-in pressure switch, manual water drain, pressure gauge, pressure relief valve and
brass fittings. Kit also comes with mounting hardware, 10 ft. of flexible high-pressure hose
and 20 ft. coiled filler hose with quality brass fittings, stainless steel mounting hardware, flexible
inlet hose, and rubber gaskets for a watertight installation