How do I adjust the spring rate?

The spring rate is adjusted by changing the air pressure in the air helper springs. This allows you to customize the spring rate for varying loads and road conditions.

What temperature range can these springs withstand?

Firestone Coil-Rite air helper springs are designed to work in temperatures between 180 °F (82 °C) and -40 °F (-40 °C). This makes them suitable for use in a wide range of climates.

GVWR stands for Gross Vehicle Weight Rating. It's the maximum operating weight/mass of a vehicle as specified by the manufacturer. This includes the vehicle's chassis, body, engine, fuel, accessories, driver, passengers, and cargo.

Firestone Coil-Rite Air Helper Spring Kit Rear 08-14 GM SUV (W237604186)

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Firestone

Firestone Coil-Rite Air Helper Spring Kit Rear 08-14 GM SUV (W237604186)

Name: Firestone Coil-Rite Air Helper Spring Kit Rear 08-14 GM SUV (W237604186)
Brand: Firestone
Price: 158.89 USD
Availability: InStock

$158.89

Levels your vehicle and assists with more effective braking and handling, even when loaded. Fits inside existing coil springs.

Key Features

Variable Spring Rate — Adjust spring rate by changing air pressure.
Levels Vehicle — Keeps your ride height correct when loaded.
Improves Handling — More effective braking and handling, even under heavy loading and adverse road conditions.
Durable Construction — Made of elastic polyurethane.
500-1000 lbs. Support — Per set (not to exceed vehicle's GVWR).