HSP Diesel 70 Inch Bolt On Traction Bars for 4 Inch Axle Diameter 2011-2019 Chevrolet and GMC LML / L5P Duramax
This product is vehicle-specific. Select your year, make, model, engine and transmission to confirm compatibility before adding it to your cart.
Colours and prices as published by HSP Diesel · verified 9/8/2026
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HSP 70" Bolt-On Traction Bars for LML & L5P Duramax (2011–2019)
The HSP 70" Bolt-On Traction Bars are engineered for 2011–2019 Chevrolet and GMC Duramax trucks equipped with LML or L5P engines and a 4" axle diameter. This kit is designed to reduce axle wrap and wheel hop while improving traction and driveline stability under load.
For owners searching for LML traction bars, L5P traction bars, or durable Duramax traction bars for street, towing, or performance use, this kit provides a true bolt-on solution with proven fitment and strength.
Why Install Traction Bars on a Duramax?
High torque output combined with rear-wheel drive can cause axle wrap and wheel hop on Duramax trucks. Wheel hop places added stress on driveshafts, u-joints, axles, and suspension components. Installing traction bars helps control axle movement and allows power to be transferred to the ground more effectively.
HSP 70" Bolt-On Traction Bar Design
The HSP traction bar system stabilizes the rear axle by connecting the axle to the frame using high-quality joints and polyurethane bushings. This design helps reduce axle wrap while maintaining proper suspension movement. The kit is fully bolt-on and does not require special tools for installation.
What’s Included
• 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)
• 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 Flat Washer (RFB-774-RFAB)
• 8x 1/2"-13 x 1-1/2" Grade 8 Hex Flange Bolt (RFB-775-1-RFAB)
• 8x 1/2"-13 Top Lock Nut (RFB-776-RFAB)
• 1x 1/2" Pull Wire (RFB-777-RFAB)
• 2x 5/8"-11 x 3-1/4" Grade 8 Bolt (RFB-848-RFAB)
• 2x 5/8"-11 x 3-3/4" 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 (RFB-721-RFAB)
• 2x Jam Nut (RFB-722-RFAB)
Fitment
• LML: VIN Code 8
• L5P: VIN Code Y
The 8th character of the VIN indicates the engine code, and the 10th character indicates the model year.
Special Note
This 70" traction bar kit is intended for Crew Cab trucks with 6' or 8' beds. Please verify vehicle configuration before ordering.
Overview
• Bolt-on traction bar kit for LML and L5P Duramax trucks
• Improved traction and reduced wheel hop
• Designed for street, towing, and high-torque applications
• High-quality joints and polyurethane bushings
• Custom powder coat color options available
Our Warranty
HSP NO BS LIMITED LIFETIME WARRANTY
HSP stands behind every traction bar kit we manufacture. Our No BS Limited Lifetime Warranty reflects our commitment to durability, reliability, and long-term customer support.
Click here to read the full HSP Warranty
HSP 70" Bolt-On Traction Bars for LML & L5P Duramax (2011–2019)
The HSP 70" Bolt-On Traction Bars are engineered for 2011–2019 Chevrolet and GMC Duramax trucks equipped with LML or L5P engines and a 4" axle diameter. This kit is designed to reduce axle wrap and wheel hop while improving traction and driveline stability under load.
For owners searching for LML traction bars, L5P traction bars, or durable Duramax traction bars for street, towing, or performance use, this kit provides a true bolt-on solution with proven fitment and strength.
Why Install Traction Bars on a Duramax?
High torque output combined with rear-wheel drive can cause axle wrap and wheel hop on Duramax trucks. Wheel hop places added stress on driveshafts, u-joints, axles, and suspension components. Installing traction bars helps control axle movement and allows power to be transferred to the ground more effectively.
HSP 70" Bolt-On Traction Bar Design
The HSP traction bar system stabilizes the rear axle by connecting the axle to the frame using high-quality joints and polyurethane bushings. This design helps reduce axle wrap while maintaining proper suspension movement. The kit is fully bolt-on and does not require special tools for installation.
What’s Included
• 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)
• 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 Flat Washer (RFB-774-RFAB)
• 8x 1/2"-13 x 1-1/2" Grade 8 Hex Flange Bolt (RFB-775-1-RFAB)
• 8x 1/2"-13 Top Lock Nut (RFB-776-RFAB)
• 1x 1/2" Pull Wire (RFB-777-RFAB)
• 2x 5/8"-11 x 3-1/4" Grade 8 Bolt (RFB-848-RFAB)
• 2x 5/8"-11 x 3-3/4" 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 (RFB-721-RFAB)
• 2x Jam Nut (RFB-722-RFAB)
Fitment
• LML: VIN Code 8
• L5P: VIN Code Y
The 8th character of the VIN indicates the engine code, and the 10th character indicates the model year.
Special Note
This 70" traction bar kit is intended for Crew Cab trucks with 6' or 8' beds. Please verify vehicle configuration before ordering.
Overview
• Bolt-on traction bar kit for LML and L5P Duramax trucks
• Improved traction and reduced wheel hop
• Designed for street, towing, and high-torque applications
• High-quality joints and polyurethane bushings
• Custom powder coat color options available
Our Warranty
HSP NO BS LIMITED LIFETIME WARRANTY
HSP stands behind every traction bar kit we manufacture. Our No BS Limited Lifetime Warranty reflects our commitment to durability, reliability, and long-term customer support.
Click here to read the full HSP Warranty
HSP offers a limited lifetime warranty to the original purchaser on eligible HSP products. Underhood powder coating has separate two-year limited coverage. Non-HSP brands follow their own manufacturer warranties. Discontinued products and customer/installer damage are excluded. Claim authorization is required; customer pays inbound shipping for ordinary claims.
Return and warranty information is based on what HSP Diesel offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
HSP Diesel warranty policyView complete warrantyProduct conditions
Return and warranty information is based on what HSP Diesel offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
Professional installation is recommended.
- Return eligibility
- HSP states returns must be postmarked within 30 days of purchase, new and unused with original tags and packaging, with an approved RMA. A 15% restocking fee and customer-paid return shipping apply. Special orders, non-HSP dropship products, apparel, used items and custom colors are excluded. Based on what HSP Diesel offers.
- Return window
- Not stated for this product; see supplier terms
- Restocking fee
- See supplier terms; no product-specific fee stated
- Return shipping
- Based on the supplier’s return policy; see terms
- Made to order
- No
- Backorder status
- Not backordered
- Cancellation
- Subject to supplier terms; contact FullSpecDiesel before requesting cancellation
- Warranty provider
- HSP Diesel
- Warranty duration
- Product-specific duration not stated; see supplier terms
- Compatibility
- Listed for specific vehicle configurations
- Legal use
- Street legal
- Processing estimate
- 3–10 business days supplier processing
- Shipping
- Shipping calculated at checkout
- Signature
- No signature requirement
- Supplier
- HSP Diesel
Product compatibility is based on the vehicle and product information provided. Review your selected truck, product options, measurements, modifications, and installation requirements before ordering.