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HP10355-J Pacbrake RearAlpha HD Pro Air Spring Suspension Kit - Chevy/GMC 2020 2500HD/3500HD (2wd/4wd)

SKU: HP10355-J
Mftr. Part#: HP10355-J
Manufacturer: PacBrake
Eliminate truck sag, sway and bottoming out with ALPHA HD PROTM air bags / air helper springs from Pacbrake, the only brand with inch-thick corrosion resistant end caps and 20 support wires for maximum strength and durability.

PRODUCT DETAILS (click to expand)

PRODUCT SPECS (click to expand)



Designed for durability and performance, the ALPHA HD PROTM Series comes with Jounce Bumpers/Bump Stops, a flexible polyurethane bumper inside the bag that prevents bottoming out, which could damage your air springs, and allows you to run your bags at 0 psi when unloaded for factory ride comfort.

Perfect for those that want the peace of mind of having an internal bumper and covet the ride comfort of being able to run without air when not towing.

For those that desire maximum bag travel, a great benefit when offroading, towing and launching boats, or for those that constantly need to lower their rear to pick up trailers, consider our HP10355 ALPHA HD air bag.

5,000 lbs of load leveling capacity*

* Never exceed manufacturer's recommended Gross Vehicle Weight Rating


  • 2020-2021 Chevrolet Silverado/GMC Sierra 2500HD/3500HD (2WD/4WD)


  • For all trucks including those with 5th wheel hitches. 
  • Not for commercial cab and chassis trucks.