Firestone fir4185 Coil-Rite Rear Air Helper Spring Kit

If you're looking for a smoother ride for your vehicle that has a coil spring suspension, Firestone Coil-Rite air helper springs are what you need. Designed to fit inside existing coil springs to create a variable spring rate, Coil-Rite will level your vehicle and assist with more effective braking and handling, even under heavy loading and adverse road conditions.Coil-Rite enables you to control the air pressure in the air helper springs so you can make adjustments for varying loads and road conditions. Spring performance can be altered as easily as inflating a tire.Firestone Coil-Rite air helper springs are made of durable, elastic polyurethane, providing years of comfort and stability to your vehicle. The air springs will support 500-1000 lbs. per set (not to exceed vehicle's GVWR). Coil-Rite Air Helper Springs are designed to work in temperatures between 180deg F (82deg C) and -40deg F (-40deg C). Coil-Rite® Air Helper Spring Kit; Rear; Incl. Air Helper Springs; Supports; Hardware; Air Line; And Inflation Valves; No Drilling Required;

• Keep Headlights Aimed On The Road
• Improve Braking Effectiveness
• Improve Steering And Balance
• Increase Vehicle Stability
• Maintain A Level Vehicle
• Prevent Bottoming Out
• Fits Gas And Diesel
• Reduce Tire Wear

The Firestone Coil-Rite fir4185 Air Helper Spring Kit is designed for vehicles with rear coil spring suspension. The air helper springs install inside the existing coil springs to create a variable spring rate, helping maintain a level vehicle and supporting improved braking, handling, steering, and stability under changing loads and road conditions.

Made from durable, elastic polyurethane, the air springs support 500–1,000 pounds per set, without exceeding the vehicle's gross vehicle weight rating. Air pressure can be adjusted to suit varying loads and road conditions, similar to inflating a tire. The springs are designed to operate between -40°F and 180°F.

Key Features & Performance Benefits

• Variable spring rate: Adjust air pressure to accommodate changing loads and road conditions.
• Load support: Supports 500–1,000 pounds per set without exceeding the vehicle's GVWR.
• Ride and handling assistance: Helps improve braking effectiveness, steering, balance, and vehicle stability.
• Leveling and protection: Helps maintain a level vehicle, reduce tire wear, prevent bottoming out, and keep headlights aimed on the road.

Key Product Specifications & Technical Data

• Brand: Firestone
• Part number: fir4185
• Product type: Coil-Rite air helper spring kit
• Application position: Rear
• Spring material: Elastic polyurethane
• Support capacity: 500–1,000 pounds per set
• Operating temperature range: -40°F to 180°F
• Installation: No drilling required

What's Included in the Box

The kit includes air helper springs, hardware, air line, and inflation valves.

Fitment

Fits 2012 Ram 1500 and 2013 Ram 1500 applications, including 2WD and 4WD configurations as identified for this product.

Fitments:
2009 Dodge Ram 1500 Laramie
2009 Dodge Ram 1500 SLT
2009 Dodge Ram 1500 Sport
2009 Dodge Ram 1500 ST
2009 Dodge Ram 1500 TRX
2009 Dodge Ram 1500 TRX4
2010 Dodge Ram 1500 Laramie
2010 Dodge Ram 1500 SLT
2010 Dodge Ram 1500 Sport
2010 Dodge Ram 1500 ST
2010 Dodge Ram 1500 TRX
2010 Dodge Ram 1500 TRX4
2011 Ram 1500 Big Horn
2011 Ram 1500 Laramie
2011 Ram 1500 Laramie Longhorn
2011 Ram 1500 Outdoorsman
2011 Ram 1500 SLT
2011 Ram 1500 Sport
2011 Ram 1500 ST
2011 Ram 1500 Tradesman
2012 Ram 1500 Big Horn
2012 Ram 1500 Express
2012 Ram 1500 Laramie
2012 Ram 1500 Laramie Longhorn
2012 Ram 1500 Outdoorsman
2012 Ram 1500 SLT
2012 Ram 1500 Sport
2012 Ram 1500 ST
2012 Ram 1500 Tradesman
2012 Ram 1500 Tradesman HD
2013 Ram 1500 Big Horn
2013 Ram 1500 Express
2013 Ram 1500 HFE
2013 Ram 1500 Laramie
2013 Ram 1500 Laramie Longhorn
2013 Ram 1500 Outdoorsman
2013 Ram 1500 R/T
2013 Ram 1500 SLT
2013 Ram 1500 Sport
2013 Ram 1500 Tradesman
2014 Ram 1500 Big Horn
2014 Ram 1500 Express
2014 Ram 1500 HFE
2014 Ram 1500 Laramie
2014 Ram 1500 Laramie Limited
2014 Ram 1500 Laramie Longhorn
2014 Ram 1500 Lone Star
2014 Ram 1500 Outdoorsman
2014 Ram 1500 SLT
2014 Ram 1500 Special Service
2014 Ram 1500 Sport
2014 Ram 1500 Tradesman
2015 Ram 1500 Big Horn
2015 Ram 1500 Express
2015 Ram 1500 HFE
2015 Ram 1500 Laramie
2015 Ram 1500 Laramie Limited
2015 Ram 1500 Laramie Longhorn
2015 Ram 1500 Limited
2015 Ram 1500 Lone Star
2015 Ram 1500 Outdoorsman
2015 Ram 1500 Rebel
2015 Ram 1500 SLT
2015 Ram 1500 Special Service
2015 Ram 1500 Sport
2015 Ram 1500 Tradesman
2016 Ram 1500 Big Horn
2016 Ram 1500 Express
2016 Ram 1500 HFE
2016 Ram 1500 Laramie
2016 Ram 1500 Laramie Longhorn
2016 Ram 1500 Limited
2016 Ram 1500 Lone Star
2016 Ram 1500 Outdoorsman
2016 Ram 1500 Rebel
2016 Ram 1500 SLT
2016 Ram 1500 Special Service
2016 Ram 1500 Sport
2016 Ram 1500 Tradesman
2017 Ram 1500 Big Horn
2017 Ram 1500 Express
2017 Ram 1500 HFE
2017 Ram 1500 Laramie
2017 Ram 1500 Laramie Longhorn
2017 Ram 1500 Limited
2017 Ram 1500 Lone Star
2017 Ram 1500 Rebel
2017 Ram 1500 SLT
2017 Ram 1500 Special Service
2017 Ram 1500 Sport
2017 Ram 1500 Tradesman
2018 Ram 1500 Big Horn
2018 Ram 1500 Express
2018 Ram 1500 HFE
2018 Ram 1500 Laramie
2018 Ram 1500 Laramie Longhorn
2018 Ram 1500 Limited
2018 Ram 1500 Lone Star
2018 Ram 1500 Rebel
2018 Ram 1500 SLT
2018 Ram 1500 Special Service
2018 Ram 1500 Sport
2018 Ram 1500 Tradesman
2019 Ram 1500 Classic Big Horn
2019 Ram 1500 Classic Express
2019 Ram 1500 Classic Lone Star
2019 Ram 1500 Classic Special Service

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: N
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1