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Firestone Work-Rite Urethane Helper Springs 8621

Product Information
Our Price: $202.99
Part #:8621
Applications: View All
  • Constructed of durable urethane
  • Adjustable spacers provided in each kit allow you to fine-tune when the helper springs engage
  • Mounts in place of your factory bump-stops
  • Simple no-drill installation (see installation guide)
  • Estimated one hour installation
Download Installation Instructions
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Ships Oct 21st - 25th


  • Constructed of ultra-durable urethane
  • Assists suspension, reducing fatigue and improving ride quality
  • Prevents bottoming out when loaded
  • Reduces vehicle sway
  • Adjustable using spacers (included in kit)
  • Easily installed in place of factory bumper stops
  • Maintenance free – no air pressure to monitor and adjust
  • Made in the USA


A fully loaded truck is beautiful sight – that's why they were built in the first place. One thing about a loaded down truck that isn't great is the reduced ride quality, whether that's increased sway or the occasional (or not so occasional) bottoming out. Well, Firestone Work-Rite urethane helper springs are an excellent option that will help you get the most out of your truck.

Work-Rite helper springs are made of an ultra-durable microcellular urethane that is going to stand up to some serious abuse. Unlike air helper springs, these guys are maintenance free, no air pressure to check. Just install them, and forget about them. Work-Rite helper springs are specifically designed to assist existing factory springs, which in turn reduces sway and suspension fatigue, prevents springs from bottoming out, and increases the vehicle's stability and ride quality while loaded, without sacrificing ride quality while unloaded.

Another great feature of the Firestone Work-Rite urethane helper springs is that they are easily installed. So, what are you waiting for again? Get a pair of these bad boys, fill up your truck bed with some rocks (*don't exceed factory GVWR*), and get on the road.

View Available Part Numbers For This Product Line


  • 1994-2001 Dodge Ram 1500 4WD
  • 2006-2008 Dodge Ram 1500 Mega Cab, 4WD, Mega Cab
  • 1994-2013 Dodge Ram 2500 4WD
  • 1994-2012 Dodge Ram 3500 4WD
  • 2007-2012 Dodge Ram 3500 2WD
  • 2010-2013 Ram Truck 2500 4WD
  • 2010-2012 Ram Truck 3500 2WD
  • 2010-2012 Ram Truck 3500 4WD


Firestone Work-Rite urethane helper springs offer an easy installation that can be done right at home. Everything you need to install - the springs, brackets, hardware, and instructions will be included with your order. Most applications require no drilling, and should install in an hour or so. If you have any questions, or concerns, please don't hesitate to give us a call at 877-216-5446 or 701-253-5906.

PDF Icon Firestone 8621 Installation Instructions

2 Year Warranty

2 Years or 24,000 Miles

Firestone Industrial Products Company warrants that Firestone products will be free from defects in workmanship or materials for a period of 24 months or 24,000 miles (whichever comes first) from date of installation. This does not include installation or other service charges for replacement. For an adjustment under this limited warranty, contact your dealer. To the extent permitted by law, Firestone disclaims consequential damages. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This limited warranty gives you specific legal rights and you may also have other rights which vary from state to state. Please note that some exclusions may apply.