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KL 6858
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HEAVY-DUTY AMPERAGE ELECTRICAL ARCHITECTURE FOR LONG-WHEELBASE RUNS
Establish a rock-solid, high-current power path across long-wheelbase vehicle setups with the premium Kleinn Model 6858 Extended Air Compressor Wiring Kit. Explicitly engineered to safely deliver clean power to heavy-draw automotive air systems over longer distances, this master electrical installation package features a massive length of premium 10-gauge structural copper infrastructure wiring. By minimizing voltage drops and eliminating electrical bottlenecks on long wire runs, this kit ensures your heavy-duty compressors start up immediately and run at peak performance without overheating your vehicle's factory electrical layers.
UNIVERSAL LONG-REACH HIGH-AMPERAGE POWER HARNESS
The Model 6858 is heavily curated with essential electrical baseline components to simplify your plumbing from bumper to bumper. Featuring a specialized 12V 30/40 amp 5-pin SPDT automotive relay and a dedicated pre-wired socket harness, this network safely separates your cabin controls from high-amperage current spikes under the hood. While optimally optimized as the official companion wiring array for Kleinn train horn systems, this versatile master installation kit can also be deployed in any custom 12V application where switching high-amperage auxiliary devices is required across extended frame rails.
THE VERDICT: The definitive long-reach electrical foundation for any high-output air network. The Model 6858 marries extended heavy-gauge current capabilities with a vital safety fuse and control relay, ensuring your onboard air installation remains secure, efficient, and completely fire-safe across large vehicles.
🔴 PRO TIP: Tailor your wire routing seamlessly to your chassis length. This extended 26-foot wiring bundle is custom-tailored to handle complex routes along frame rails. If your vehicle layout is more compact and does not require an extended long-reach line run, you can utilize our standard 14.75-foot power line setup by choosing Kleinn Part #6852 Wiring Kit.
PRODUCT SPECIFICATIONS
| Feature | Details |
|---|---|
| Part Number | 6858 |
| Wire Gauge Core Sizing | Heavy-Duty 10 AWG Power Line / 18 AWG Signal Line |
| Power Wire Length | 26.0 Feet Total Extended Run |
| Relay Specifications | 12-Volt DC / 30/40 Amp 5-Pin SPDT with Socket Harness |
| Circuit Protection Sizing | Inline ATC Fuseholder with 30-Amp ATC Fuse Included |
| Bonus Dash Control Switch | Model 320 (Brushed Nickel - 7/8" Face / Fits 3/4" Hole) |
| System Voltage Compatibility | Standard 12-Volt DC Automotive Electrical Loops |
| Universal Utility Applications | Long-Bed Trucks, Full-Size SUVs, Air Compressors, Train Horn Solenoids, Auxiliary Relays |
INSTALLATION LINKS

$114.95
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.