Pacbrake Air Suspension Helper Spring Kit

Pacbrake ALPHA Series Air Suspension Helper Spring Kits

When a truck is asked to tow heavy trailers, haul loaded beds, or carry a camper, the factory rear suspension is often the first thing to show its limits — sagging ride height, excessive bounce, and unsettling sway. Pacbrake has built its entire air suspension lineup around solving exactly these problems, and their Air Suspension Helper Spring Kits stand apart from the competition in several meaningful ways.

What Makes Pacbrake's Air Springs Different

The most distinctive feature of Pacbrake's helper spring kits is their construction. Pacbrake air bags are the only heavy-duty air bags on the market with one-piece, inch-thick aluminum end caps and 20 support wires, delivering maximum strength and durability. Competing brands typically rely on plastic end caps that are more susceptible to cracking and air leaks — especially in cold-weather conditions. Pacbrake's solid aluminum end caps resist corrosion and fracturing, making them a particularly compelling choice for trucks that see year-round use in harsh climates.

The ALPHA Product Family: Three Tiers of Capacity

Pacbrake structures its Air Suspension Helper Spring Kit lineup around three distinct performance tiers to match the demands of any truck owner:

• ALPHA SD (Standard Duty): Rated to 1,800 lbs per pair, these sleeve-style air springs are engineered for half-ton trucks and mid-size pickups — such as the Chevy Silverado/GMC Sierra 1500, Dodge RAM 1500, and Toyota Tacoma — where added support under moderate loads is the goal without sacrificing daily ride quality.
• ALPHA HD (Heavy Duty): The flagship of the lineup, these double convoluted air springs deliver up to 5,000 lbs of load-leveling capacity per pair. Vehicle-specific kits cover a wide range of popular platforms including the Ford F-250/F-350 Super Duty, Dodge RAM 2500/3500, and Toyota Tundra. Each kit ships with corrosion-resistant roll plates, precision laser-cut powder-coated steel brackets, grade-5 plated hardware, airline, and all required accessories for a complete bolt-on installation.
• ALPHA XD (Xtreme Duty): Designed for the most demanding towing and hauling applications, ALPHA XD bags are rated up to 7,500 lbs per pair — the highest capacity option in the Pacbrake catalog.

ALPHA HD PRO: The Premium Upgrade

For drivers who want the ultimate combination of capability and comfort, Pacbrake's ALPHA HD PRO series adds polyurethane Jounce Bumpers (internal bump stops that prevent the bag from bottoming out) and stainless steel hardware. Critically, the Jounce Bumper design allows the bags to be run at 0 psi when not towing, so drivers retain their factory-smooth ride on empty drives and only dial in air pressure when the load demands it.

Broad Vehicle Coverage & Easy Installation

Pacbrake offers both vehicle-specific and universal-fit kits, covering a wide range of domestic and import trucks. Whether the application is a classic C/K Silverado, a modern Ford F-150, or a Mercedes Sprinter van, there is a Pacbrake helper spring solution available. All vehicle-specific kits are engineered as complete, self-contained packages — everything needed for installation is included in the box. Pacbrake also offers spacer kits for lifted trucks, allowing lifted-vehicle owners to take advantage of ALPHA HD air springs while maintaining their desired ride height.

For trucks that spend their lives working hard — towing, hauling, and carrying — Pacbrake's Air Suspension Helper Spring Kits deliver the load support, durability, and ride stability that factory springs simply were not designed to provide on their own.