Kleinn Automotive Accessories GMHD20-734 - GM Truck Kits
Kleinn Automotive Accessories GMHD20-734 - GM Truck Kits
Kleinn Automotive Accessories GMHD20-734 - GM Truck Kits
Kleinn Automotive Accessories GMHD20-734 - GM Truck Kits

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Description

Dominate the road with the ultimate train horn and onboard air system. If you are looking for the loudest train horn for your truck alongside an onboard air system that delivers extreme power and unmatched reliability, this setup is built for you. This system is not for the timid, it is engineered specifically for drivers who want to command attention, turn heads, and run the most powerful train horn kit on the road. This direct-fit, 100 percent bolt-on train horn and onboard air system is engineered for maximum performance with zero hassle, requiring no drilling and no fabricating for pure, unapologetic power.At the heart of this system is an exclusive 100 percent duty-cycle waterproof air compressor, paired with a high-capacity, anti-corrosion-coated air tank built for long-term durability. When you hit the switch, the XCR 2.0 black-coated Demon stainless steel train horns unleash a blast so loud and aggressive it rivals a real locomotive, making it one of the loudest train horn kits for trucks on the market.True direct-fit installation means every component mounts cleanly under your truck using precision-engineered, powder-coated brackets that bolt directly to factory locations. This guarantees no drilling, no guesswork, no cutting, and an OEM-clean fitment for a stealthy, rock-solid installation that hits like a freight train.Built for long-term performance, every hose, fitting, and accessory is designed for long-term punishment and minimal maintenance. This complete kit includes a heavy-duty air hose, quick-connect fittings, a glow-in-the-dark inflator gauge, and all wiring and hardware needed for installation. For those who want even more power, you can add the BlastMaster Upgrade Kit (Model 6890) for a 30 to 40 percent increase in volume. This upgrade gives each horn its own dedicated heavy-duty brass solenoid and half-inch airline for maximum airflow and maximum output, making your setup one of the loudest aftermarket train horns available.

Kleinn Bolt-on Steel Train Horn & Onboard Air Kit - 2020-2026 2500, 3500 Silverado, Sierra (Running boards that use 4 mounting locations on frame rail require removal of 1 support)

Specifications

BrandKleinn Automotive Accessories
Part NumberGMHD20-734
Airline Size1/2" High-Pressure Airline
Horn LengthsEach Horn Measurement: 21.75” Lg. – 17.75” Med. - 13.5” Sm.
Horn MaterialStainless-Steel Trumpets with Zinc-Alloy Metal Base
Model 1302Quick connect relocation kit - place air source wherever you wish
Model 6353RT3-Gallon Air Tank with Cortec Interior Anti-Corrosion Coating
Model 6450RCHeavy-Duty Waterproof Air Compressor 200 PSI / 100% Duty Cycle
Model 730Demon Black Stainless Steel Triple Train Horn - Produces a thundering 157.8 dB Blast
Model INF-1Tire Inflation Kit- 24' Heavy-Duty Hose w/ Quick-connect couplers - Glow Face Gauge Inflator
Model VX-6003(1) Heavy-Duty Brass Air Solenoid (12-Volt) - 3/8" inlet/outlet
MountingCustom Powder Coated Steel Mounting Brackets, Made in the USA!
Mounting LocationMounting - Horns:(2) Inside cavity of bedside steps, (1) between fuel tank and exhaust system. Tank: Mid driver side frame rail. Compressor:Mid Passenger side frame rail
Upgrades AvailableUltra BlastMaster Upgrade kit 6890, Model 333 Sniper Remote Control kit, HCL-3 Horn Covers
Weight62 lbs

Vehicle Fitment

Year(s)MakeModelSubmodelNotes
2020-2026ChevroletSilverado 2500 HDBASERunning boards w/ 4 mounts require removal of 1 mount)\; Mounting Horns:(2) Inside cavity of bedside steps, (1) between fuel tank and exhaust system. Tank: Mid driver side frame rail. Compressor:Mid Passenger side frame rail
2020, 2022-2026ChevroletSilverado 3500 HDBASERunning boards w/ 4 mounts require removal of 1 mount)\; Mounting Horns:(2) Inside cavity of bedside steps, (1) between fuel tank and exhaust system. Tank: Mid driver side frame rail. Compressor:Mid Passenger side frame rail
2020-2024, 2026GMCSierra 2500 HDBASERunning boards w/ 4 mounts require removal of 1 mount)\; Mounting Horns:(2) Inside cavity of bedside steps, (1) between fuel tank and exhaust system. Tank: Mid driver side frame rail. Compressor:Mid Passenger side frame rail
2020-2026GMCSierra 3500 HDBASERunning boards w/ 4 mounts require removal of 1 mount)\; Mounting Horns:(2) Inside cavity of bedside steps, (1) between fuel tank and exhaust system. Tank: Mid driver side frame rail. Compressor:Mid Passenger side frame rail
2025GMCSierra 2500 HDBASEMounting Horns:(2) Inside cavity of bedside steps, (1) between fuel tank and exhaust system. Tank: Mid driver side frame rail. Compressor:Mid Passenger side frame rail; Running boards w/ 4 mounts require removal of 1 mount)\
2021ChevroletSilverado 3500 HDBASEMounting Horns:(2) Inside cavity of bedside steps, (1) between fuel tank and exhaust system. Tank: Mid driver side frame rail. Compressor:Mid Passenger side frame rail; Running boards w/ 4 mounts require removal of 1 mount)\

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Kleinn Automotive Accessories P/N GMHD20-734

GM Truck Kits

$1,299.95

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In Stock
13 from our supplier network

Free pickup at an H&H store Free — we'll bring it to your store, usually 1–3 days
Professional installation available
We install this. Labor runs $140/hour and the time varies by product, so call your local store for an exact quote.
800-953-7108
Nothing is charged for it today — your local H&H store works out the exact cost when they call to say your order has landed.
Ships Fast
Free store pickupReady at your local H&H
22 storesAcross the Southeast
Family-ownedServing trucks since 1987
Installation availableLabor from $140/hour — ask your store
Fitment guaranteeIf it doesn't fit, no restocking fee Details
Price matchFound it cheaper? Tell us before you buy Details
Warranty handled hereClaim it at the store, not by mail Details
4.8 out of 5 stars, 5,770 Google store reviews. These rate our stores, not this product. Read the reviews.
4.8
5,770 reviews
Store reviews on Google

Rated 4.8 across 24 stores

Every review below is a verified Google review of an H&H store — written by real customers about the people who sold, fitted and stood behind their gear.

Vincent Ledbetter
Gainesville · 2 hours ago

Professional service all the way, I will come back for any future upgrades!

Coma81
Warner Robins · 4 hours ago

Great customer service and great work on my truck. Kim and the team were exceptional every visit

Deborah Williams
Conyers · 5 hours ago

Knows what exactly what I need and did solve my issues,problem

Mr all in 1
Jonesboro · 1 day ago

Go see Darien he is Elite customer service was great. Also, they are the Goodfellas.

Eric Yarbrough
Decatur · 2 days ago

Did a great job putting a hitch in my truck

Russell Wright
Marietta · 2 days ago

My ARE truck bed cover was off line & not closing properly. The repair was not an easy fix but they took their time & made sure the bed cover closed perfectly & I can now lock my bed securely again with my key fob! The price I was charged was very fair even though the job was time consuming! I am a fan & will definitely be back! Excellent customer service. & very friendly!

Mike Craig
Trussville · 3 days ago

Professional sales people. Very nice

Jack Mulsanne
Cumming · 5 days ago

Just left this place and I was thoroughly impressed! Justin and Andrew were professional and knowledgeable. Thank you guys, I’m really happy with my new cam locker box.

Steve Hatcher
Columbus · 5 days ago

This crew was run by Justin and a couple more worker. They were extremely friendly and super professional and efficient at their job. I am extremely pleased with the finished job and can’t say enough good about this product.

Reviews of H&H Truck & Outdoor stores, sourced from Google. They rate our stores and service, not this individual product.

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