Compressor has to be within 17” of horn? So no roof mount?

2015 Silverado Lt. I have 6 individual trumpets in between the grill and the radiator. They are mounted around the edge of the radiator not to block air flow for cooling. 4 compressors are mounted in the front of engine compartment, two of the trumpet lines are 4'FOOT, and then the rest are at 3FOOT. They sound great and are LOUD! 4' would get you from the cowl in engine compartment up the windshiel/door piller to one side or other between roof liner and roof. You can test out the trumpet hose lenght before you do all that work. All together 6ct in my truck are VERY LOUD!!! Trains though still out do me but not by much .LOL signed, Huh?

Whats the warranty on this, my horn has stopped working?

You probably need a new relay. That's what I am replacing on mine right now. They go out over time. Its a JD1912 12V 80A relay. Here is one on amazon: https://www.amazon.com/gp/product/B07W6Y7811/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

I bought two kits. What’s the best way to hook two of these up? Also has anyone used one compressor with air hose ran to two horns?

Just splice the horn wires into both. Compressor won't run both optimal. I ended up keeping stock horn on truck since when I lock my truck, the horn wasn't honking ( lock feedback) as if the compressor wasn't able to do it.

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🚨 Make your presence impossible to ignore!

PLUG PLAY INSTALLATION - Custom relay wiring kit with no-break design and clear photo instructions means you’re road-ready in no time.
DRIVE SAFER FEEL CONFIDENT - Alert pedestrians, animals, and other drivers instantly—because your safety deserves the loudest voice.
VERSATILE FIT FOR EVERY RIDE - From trucks and SUVs to boats and motorcycles, this universal 12V horn fits seamlessly on all your vehicles.
COMMAND THE ROAD WITH 150 D B POWER - Cut through city noise and rural silence alike with an ear-splitting 150dB horn that demands attention.
BUILT TO LAST WITH PREMIUM CHROME ZINC - Rust-resistant, vacuum chrome-plated zinc trumpet ensures your horn stays sleek and durable through every season.

The GAMPRO 12V 150DB Car Air Horn features a powerful 150-decibel sound output from a rust-resistant chrome zinc trumpet and an all-copper coil compressor. Designed for universal 12V vehicle compatibility, it offers easy installation with a custom relay wiring kit and durable construction for long-lasting performance across cars, trucks, boats, and more.

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Brand	GAMPRO
Color	BLACK
Item dimensions L x W x H	17.52 x 3.54 x 3.54 inches
Style	Classic
Noise Level	150 dB
Automotive Fit Type	Universal Fit
Manufacturer	GAMPRO
UPC	799953388937
Model	12V Air horn
Item Weight	2.42 pounds
Product Dimensions	17.52 x 3.54 x 3.54 inches
Item model number	GAM-DG-CBL
Is Discontinued By Manufacturer	No
Exterior	Machined
Manufacturer Part Number	GAM-DG-CBL

12V 150DB Car Air Horns, 18 Inches Chrome Zinc Single Trumpet Truck Air Horn with Compressor for Any 12V Vehicles Trucks Lorrys Trains Boats Cars (BLACK)

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