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KL HK9-Slimline
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Model HK9-Slimline: Universal ProBlaster™ Demon™ 730 Stainless Steel Triple Train Horns & Onboard Air System
Why The "Demon" is the Undisputed King of the Road!
When the situation demands more than just loud horn, the Demon 730 stainless steel horns dominate the road! Delivering a sonic roar that cuts through sirens, heavy machinery, and chaotic traffic these precision tuned steel horns are the ultimate train horn solution. Featuring XCR 2.0™ coated horns, the Demon 730 thrives in the elements providing unmatched durability. come mounted a flat rack, but each can be removed from the rack and mounted separately for maximum installation flexibility.
Massive Pneumatic Power!
Designed for those who refuse to compromise, the HK9-Slimline is the ultimate upgrade for your rig. Powered by our industry-exclusive (6450RC) waterproof compressor, this high-performance system is more than our loudest horn; it is an integrated onboard air command center. Whether you are delivering a deafening blast, inflating 37" tires, managing air-bags, or engaging lockers, the HK9-Slimline provides professional-grade pneumatic power anytime you need it.
Versatile Mounting Options - Smaller Footprint
The HK9-Slimline features all the components of the standard HK9 kit but uses a smaller, 3-gallon (6351RT) slim air tank. This slim design is ideal for frame rail mounting and offers the versatility needed for small to mid-size trucks and SUVs where space is limited. The horns come mounted on a flat rack and can be removed to mount individually for maximum installation flexibility. If you require more air capacity, search the HK9 kit, includes larger 5-gallon (6450RT) air tank.
THE VERDICT: If you want to be heard before you're seen, the Demon™ 730 is your weapon of choice. It stands as the largest and loudest train horn in our arsenal, designed specifically for those who want to dominate the road with a professional-grade locomotive blast paired with rock-solid reliability in a package sized to fit most trucks or SUVs.
WANT THEM EVEN LOUDER?
Unleash the full fury of your Demon™ 730 Horns!
Experience the Demon 730 Horns in all their glory! The Ultra BlastMaster™ (6890) re-engineers the horns to deliver a massive 30% decibel increase through optimum airflow for extreme output. It’s a simple law of physics: more air equals more power. We ditched the standard 3/8” lines at the horns in favor of a high-flow, dedicated 1/2” airline and premium VX6003 brass solenoids mounted to each individual horn. The result is a shocking twist on a classic; delivering devastating, soul-shaking decibel levels that command attention across city blocks. Overwhelm the senses and dominate the streets with the absolute peak of train horn intensity right at your fingertip. Because when it comes to the ultimate locomotive blast, “TOO LOUD” is just right.
TOO LOUD? TOO BAD!
HK9-Slimline Kit Includes:
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Train Horn Specifications
Air Compressor Specifications
Air Tank Specifications
Installation Instruction Links: Model 6890 Blastmaster Upgrade Kit 730 Horn Disassembly Instructions
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$1,149.95
Kleinn Automotive Accessories is committed to delivering high-quality products to our customers. We stand behind the craftsmanship and materials of our products by offering a comprehensive one-year limited warranty. This warranty is extended to the original purchaser, ensuring that when our products are installed properly and used under standard conditions, they will be free from defects in workmanship and materials for a period of one year from the original date of purchase.
This warranty encompasses a promise that the product you have purchased will perform as expected under normal use conditions and will not suffer from flaws in materials or craftsmanship. However, it is important to note that this warranty does not cover any damage that results from abusive use, operation that is not in line with the product’s intended purpose, or harm resulting from exposure to harsh environmental conditions. In the event that a product is found to be defective within the warranty period following a thorough inspection, Kleinn Automotive Accessories reserves the right to either repair or replace the defective item at no additional charge to the purchaser. It is our goal to ensure that our products meet the high standards that our customers expect, but we also want to clarify that Kleinn is not responsible for covering any costs related to the installation of our products, nor are we liable for any loss or damage that may occur as a result of the repair or replacement process of any product under warranty.
Understanding the specific needs of our customers and the demands placed on certain products, Kleinn Automotive Accessories is pleased to offer an exclusive extended two-year warranty for our 6450/6650 Compressors and 730 Horns. This special warranty extension reflects our confidence in these products’ durability and performance. Eligible products under this extended warranty will enjoy all the benefits of our standard one-year warranty with an additional year of protection, totaling two years from the date of purchase. This extended warranty coverage ensures that these specific models, recognized for their robustness and reliability, receive the extra assurance customers desire for these critical components.
Should you need to initiate a return under the warranty, we have a straightforward process designed to make it as convenient as possible for our valued customers. To start, you will need to email a copy of your sales receipt, which must be dated within the past year for standard warranty claims or within the past two years for claims under the extended warranty for the 6450 Compressors and 730 Horns. This email should be directed to our Warranty Manager and include your full name, email address, telephone number, and a concise description of the problem you are experiencing.
Upon receipt of your email, a dedicated representative from Kleinn Automotive Accessories will reach out to you directly. Our first step will always be to attempt to resolve the issue through technical support, aiming to provide a quick and effective solution. If the problem cannot be addressed remotely, our representative will issue a Return Authorization number. This number is crucial as it will identify your return throughout the inspection process. You are then required to send the product back to Kleinn Automotive Accessories for a comprehensive physical inspection.
Upon inspection, if the product is determined to be defective due to issues in workmanship or materials, Kleinn will undertake to either repair or replace the product at our discretion. We are committed to ensuring that our customers receive products that meet our high-quality standards, and we will make every effort to resolve warranty claims to your satisfaction. However, if the inspection reveals that the product does not have a material defect, we will return the unit to the customer. In such cases, the shipping costs for the return will be the responsibility of the customer.
Your item must be in its original unused condition to be returned, unless there is a manufacturer defect. You must return the item within 30 days of your purchase.
1. Please email support@kleinn.com to request a refund and we will assign you a Return Authorization #.
2. Mail your returned item to:
Kleinn Automotive Accessories
Returns Department
4045 N Highway Drive
Tucson, AZ 85705
3. Include in your package a signed letter stating the reason for your return and the original receipt.
Merchandise that has been worn, used, or altered will not be accepted for return or exchange.
All returns are subject to a 15% restocking fee, which will be deducted from your refund. If shipping and handling fees were applied to your order, they are non-refundable.