2011-2019 Duramax LML/L5P HSP Diesel 70" Bolt-On Traction Bars 4" Axle Diameter (535-2-HSP)
The HSP 70" Bolt-On Traction Bars are designed for 2011-2019 Chevrolet and GMC Duramax trucks with 4" axle diameters. These are the first true bolt-on traction bar kits made specifically for LML and L5P trucks and are ideal for stock trucks, drag builds, and street monsters alike.
Why You Need This Kit
Diesel trucks are notoriously front-heavy due to large engine bays, plow mounts, and other accessories. This imbalance, paired with rear-wheel drive and high torque output, often leads to wheel hop. Wheel hop can cause serious damage to driveline components including driveshafts, u-joints, axles, and yokes. Installing traction bars mitigates this problem and allows your truck to reliably transfer power to the ground.
What Makes the HSP Kit Different?
The HSP 70" Traction Bars effectively stabilize the rear axle by tying key points on the axle directly to the frame, reducing axle wrap and enhancing traction. These bars include high-quality joints and bushings, engineered for both strength and longevity. This kit offers precise fitment, proven durability under extreme use, and powder coating options for custom styling. Installation is straightforward with no special tools required.
- Complete bolt-on kit for most applications
- Custom powder coat color options available
- Upgraded rear brackets for added strength
- Easy installation ” no special tools required
- Improved traction and reduced wheel hop
- Multiple length options for accurate fitment
- 1x 70" Bolt On Traction Bar (HSP-IN-678-2)
- 1x 70" Bolt On Traction Bar (HSP-IN-678-2)
- 1x Front Traction Bar Bracket Left (HSP-IN-657-D)
- 1x Front Traction Bar Bracket Right (HSP-IN-657-P)
- 1x Rear Traction Bar Bracket (11-19) (HSP-IN-663-2)
- 1x Rear Traction Bar Bracket (11-19) (HSP-IN-663-2)
- 4x 1/8" Aluminum Rivet (RFB-098-RFAB)
- 2x Small HSP Logo (Flat) (RFB-752-F-RFAB)
- 4x Polyurethane Bushings (RFB-835-RFAB)
- 2x Bushing Inserts (DOM Tubing) (RFB-836-RFAB)
- 8x 1/2" x 1.062" OD Low Carbon Flat Washer (RFB-774-RFAB)
- 8x 1/2"-13 x 1-1/2" Grade 8 Hex Flange Bolt - Machined (RFB-775-1-RFAB)
- 8x 1/2"-13 Eco Finish Steel Top Lock Nut (RFB-776-RFAB)
- 1x 1/2" Pull Wire (RFB-777-RFAB)
- 2x 5/8"-11x3-1/4" Grade 8 Bolt (RFB-848-RFAB)
- 2x 5/8"-11x3-3/4" Grade 8 Bolt (RFB-849-RFAB)
- 4x 5/8"-11 Nylon Lock Nut (RFB-850-RFAB)
- 8x 5/8" Washer (RFB-851-RFAB)
- 2x Flex Joint (3/4"-16 Thread, Bolt Dia. .625") (RFB-721-RFAB)
- 2x Jam Nut (3/4"-16) (RFB-722-RFAB)
- LML: VIN Code 8
- L5P: VIN Code Y
How to Confirm Fitment: The 8th character of your VIN indicates the engine code; the 10th character indicates the model year.
This 70-inch traction bar kit is intended for Crew Cab trucks with 6' or 8' beds. If you're unsure of your vehicle's configuration, please contact HSP for assistance before ordering.
Order Processing Time:
Orders are typically processed within 24-48 hours after the order has been placed.
Custom or special order items may take longer to process, typically 3-5 business days depending on the product and customization required.
Shipping Methods:
Standard Shipping (3-7 business days - location dependent)
Express Shipping (1-2 business days- location dependent)
Packaging:
All parts are securely packaged to better prevent any damage during transit. Fragile or high-value parts will be packaged with additional protective materials, such as bubble wrap or foam padding.
Shipping Rates:
Shipping rates vary based on the size, weight, and destination of the package. You can view the estimated shipping costs for your order during the checkout process before placing your order.
Order Tracking:
Once your order has been shipped, you will receive an email with the tracking number and carrier information. You can also track your order status by logging into your OCDiesel account.
USA Shipping:
We ship to the USA! (Except California) Please note that USA shipping rates and delivery times may vary based on destination. Customers are responsible for any customs fees, import taxes, or additional charges that may apply.
Not all products are stocked in-house. To ensure you receive your desired items promptly, please check for availability before placing your order. Some products may be backordered due to high demand or supply chain constraints, which could result in longer delivery times.
We strive to keep our inventory updated regularly, but availability can change quickly. For the most accurate information, contact the OCDiesel customer service team using either this link, or the chat bubble on the bottom right of this page.
Special order items are custom-ordered specifically for you and are not eligible for cancellation or return once the order has been placed. If an exception is granted, the item must be unused, in original manufacturer packaging, and in resalable condition.
All approved cancellations or returns of special order items are subject to restocking fees, with some items subject to higher fees depending on supplier policies. Return Authorization (RA #) is required, and all return shipments must include tracking. Return shipping costs are the responsibility of the customer.
Custom-built, made-to-order, electronic, and digital goods are strictly final sale—no exceptions.
For full details on return procedures, fees, and exceptions, click here.
