Timbren GMFW4C Front Suspension Enhancement Kit


Timbren GMFW4C Front Suspension Enhancement Kit


Ships FREE to US in 3-5 days (Estimated) from closest warehouse!

Ships FREE!


Timbren Front Suspension Kit for GM medium& heavy-duty trucks

This SES Suspension Upgrade fits the front suspension of a GM medium& heavy-duty trucks (see below for full list of applications). Each laser cut piece of steel is powder-coated to ensure a quality fit. We’ve engineered our hollow rubber springs to deliver a progressive spring rate. In other words, the more weight that pushes down on the rubber springs (weight from a snowplow or heavy aftermarket accessories – such as a steel bumper) the harder they work to prevent front-end sag.

This kit is rated at 4000 lbs. capacity. Even though you’re increasing the spring rate by adding this upgrade, this does not increase the GVWR (Gross Vehicle Weight Rating). Please make sure that the load does not exceed the GVWR set by the manufacturer.

Product Features:

  • Eliminate Vehicle Squatting & Sagging
  • Cushion Road Shocks
  • Improve Handling
  • Satisfaction Guarantee
  • Lifetime Warranty


  • Chevrolet W3500 Tiltmaster 1998-2009. All Models
  • Chevrolet W3500 Truck 2008-09. All Models
  • Chevrolet W4500 Tiltmaster 1998-2010. All Models
  • Chevrolet W4500 Truck 2008-2010. All Models
  • Chevrolet W5500 Tiltmaster 1998-2009. All Models Including HD
  • Chevrolet W5500 Truck 2008-2009. All Models Including HD
  • GMC W3500 Forward 1998-2009
  • GMC W4500 Forward 1998-2009
  • GMC W5500 Truck 2000-2009. All Models Including HD
  • Isuzu FSR 1988-1020. All Models
  • Isuzu NPR 1988-2021. All Models
  • Isuzu NPR-HD 1988-221. All Models
  • Isuzu NQR 1988-2021. All Models
  • Isuzu NRR 1988-2021. All Models
  • Isuzu Reach 1988-2021. All Models
  • Sterling Truck 360 2007-2010. All Models

Tech Specs

Weight: 6.55 lbs

Made in: Canada

Mill Supply has been the #1 supplier of step van parts for over 30 years. If you have a Workhorse, Utilimaster, Grumman, Morgan Olson, Supreme, International or other type of walk-in van you have landed on the right page. You will not find a more complete listing of parts for stepvans anywhere! With research and development on-the-go, new products are constantly being added to keep up with the growing industry. You can count on great customer service, fast shipping, and discount prices when you shop with us. It doesn't matter if you use your truck on-the-job, for deliveries, or run a food truck, you can count on Mill Supply to keep your vehicle in top shape. We distrubute parts for Todco, Whiting, Velvac, Timbren and Kason. If you have any questions don't hesitate to either contact us via email or give us a call at 800-888-5072 between 8:00 a.m. - 5:00 p.m. E.S.T. and one of our experienced representatives will be happy to help you.



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