Looking for the loudest air horn kit we sell? You found it! Our Rocker 127H air horn kit was designed to pack enough power to rock your world while being compact enough to fit in most vehicles. Perfect for smaller vehicles where the air source system will be kept in a trunk or a toolbox, you will not find a louder horn kit this compact anywhere else! Our Rocker air horn that is included in our Rocker 127H air horn kit is the loudest air horn on the market. Our Rocker air horn consists of two of the four bells of our classic Shocker XL train horns and still packs the same amount of punch. Constructed from an ultra-durable fiberglass-reinforced ABS composite with stainless-steel diaphragms and backed by a limited lifetime warranty against manufacturer defects, our Rocker air horn is not only the loudest air horn you can get but are also some of the most durable. Powering our Rocker air horn is our 127H Air Source Unit. The 1.5-gallon tank comes pre-wired and pre-plumbed with a mounted Viair 275c air compressor, providing 3-4 seconds of honk time and recovers the tank in about 30 seconds! As most of the wiring and plumbing is already done for you, this kit is perfect for beginners or vehicles with limited space. Our Rocker 127H air horn kit comes as a complete kit with hardware and instructions included. (Note: Tank mounted air compressors are not fully sealed. For this reason, the manufacturer recommends the tank/compressor system be mounted in the upright position in an enclosed space away from moisture, dirt, debris, etc… Failure to mount this product as directed will void the warranty) **Detaching the compressor from the tank will void your warranty on this kit. If you need a solution where the compressor is detached, please look at our 232 and higher models. ** Lightweight & Extremely Loud Rust-proof Stainless Steel Diaphragms Compact Design For Even The Tightest Spots All Standard Mounting Hardware Max Honk Time: 3 to 4 Second HornBlasters Rocker Air Horn HornBlasters 127H Air Source Unit 17ft 1/2in DOT Spec Air Line Complete Wiring Kit* All Fittings & Mounting Hardware Detailed Installation Manual Over The Phone Technical Support Earplugs Part Number: HK-S2-127V Horn: Shocker S2 Dual Air Horns Material: High-Impact ABS Length: B3 14.75″ (374.65 mm) B4 12.75″ (323.85 mm) Flare: 5″(127 mm) Weight: 2.25 lb (1.02 Kg) Fitting Size: ⅛″ M NPT Air Source Unit: HornBlasters 127H Working Pressure: 120 PSI Air Source Length: 15.2″ (386.08 mm) Air Source Width: 5.9″ (149.86 mm) Air Source Height: 12.8″ (325.12 mm) Air Source Weight: 13.75 lb (6.24 Kg) Air Source Kit Tank: Viair 1.5 Gallon 4 Port Tank Volume: 1.5 gal (6.6 L) Ports: 4 x ¼″ NPT Ports Tank Length: 15″ (381 mm) Tank Width: 6″ (152.4 mm); Tank Height: 8.5″ (215.9 mm) Tank Weight: 8.65 lb (3.92 Kg) Air Source Kit Compressor: Viair 275C Air Compressor Voltage: 12 volts DC Max Amperage: 18 amps Maximum Duty Cycle: 25% @ 100 PSI Compressor Length: 6.5″ (165.1 mm) Compressor Width: 3.5″ (88.9 mm) Compressor Height: 4.5″ (114.3 mm) Compressor Weight: 5.1 lb (2.31 Kg)