HSP Diesel 70 Inch Bolt On Traction Bars for 4 Inch Axle Diameter 2011-2019 Chevrolet and GMC LML / L5P Duramax

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 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 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