Timbren F-150 SES Front & Rear Kits by Year and MPN

Timbren Suspension Enhancement System (SES) kits use progressive hollow Aeon rubber springs to support the truck's existing suspension as load increases. A front kit and a rear kit cannot be interchanged, and even two rear kits for Ford F-150 trucks can have different mounting hardware and installed heights. This reference compares three exact Timbren part numbers carried by NewRVParts.

First identify the truck generation and suspension position

Rear suspension: two different F-150 generationsFR1504D is Timbren's rear SES kit for listed 2009–2014 Ford F-150 applications. FR1504E is the separate rear kit for 2015-and-newer F-150 applications. The mounting geometry, overall installed kit height and Aeon spring rating differ. Match the truck before comparing the weight figures.
Front suspension: FF150GFF150G is a front SES kit identified by Timbren for 2015–2020 Ford F-150 applications. Front suspension loads can include a compatible snowplow, bumper or winch. It is not a replacement for the rear FR1504E kit on the same generation.

Timbren F-150 part-number chart

Timbren MPN Listed F-150 years Position Spring-system rating Installation note
FR1504D 2009–2014 Rear 8,600 lb 7¾ in without 1-in spacer; 8¾ in with spacer
FF150G 2015–2020 Front 14,000 lb Front spring must contact axle after installation
FR1504E 2015–2026 Rear 6,000 lb 7 in without 1-in spacer; 8 in with spacer

The manufacturer currently describes FR1504E as a 2015-and-newer rear kit; our product listing covers model years through 2026. Exact trim, original suspension, axle configuration and any modifications still require confirmation against Timbren's current application information.

A suspension-kit rating is not new payload capacity. Timbren lists 8,600 lb for FR1504D, 14,000 lb for FF150G and 6,000 lb for FR1504E. Those are the manufacturer's SES kit capacity ratings, not extra pounds that may be added to the truck. These products do not increase the vehicle's GVWR, GAWR, payload or tow rating.

Front and rear kits have different clearance instructions

On the front FF150G, Timbren specifies that its Aeon spring should contact the front axle after installation. On the rear FR1504D and FR1504E, Timbren describes approximately ½–1½ inches of clearance in the unloaded arrangement between the rubber spring and its contact surface. The correct installed space is important to how the springs engage and how the truck rides without a heavy load.

The rear kit dimensions are different: FR1504D is listed at 7¾ inches without its 1-inch spacer or 8¾ inches with it; FR1504E is listed at 7 inches without its 1-inch spacer or 8 inches with it. These are kit height specifications, not a universal instruction to add or remove a spacer. Use the exact installation procedure to establish the proper clearance on your truck.

What comes in these SES kits?

Each listed kit includes a pair of Timbren Aeon hollow rubber springs and its manufacturer-specified mounting hardware. Both rear applications include rubber spacers and brackets appropriate to their respective kits. FF150G has the front mounting assemblies. The kit provides passive spring assistance—there is no compressor, pressure gauge, airline or inflation valve to install.

What to check before ordering or replacing a kit

  1. Confirm year and suspension location. An F-150 rear kit for 2009–2014 is not automatically compatible with a 2015–2026 truck; front and rear mounting points also differ.
  2. Check exact vehicle configuration. Verify 2WD/4WD, factory suspension equipment, lift or levelling modifications, and any vehicle-specific exclusions with Timbren's latest application details.
  3. Review installed spring clearance. Follow the correct MPN instructions for the factory ride height and any permitted spacer. Do not transfer the front kit's axle-contact rule to the rear suspension.
  4. Inspect the existing mounting points. Check brackets, bolts, original bump-stop locations and clearances for brake hoses, suspension travel and adjacent components.
  5. Confirm what the vehicle can legally carry. Use the Ford door-jamb certification label for the actual GVWR, axle ratings and payload. Auxiliary spring assistance cannot raise those limits.
  6. Install safely. Securely support the vehicle and use the exact Timbren instruction sheet and specified fastener torques; ask a qualified installer to review any unusual mounting or modified suspension.

Find each Timbren kit by its exact manufacturer number

These cards link directly to the NewRVParts product listings. Orders ship from supplier warehouses; viewing or pickup at those warehouses is not offered.

Considering adjustable air springs instead?

For a different approach to auxiliary suspension support, our Firestone Air Command guide explains compressor controls for compatible inflatable air springs. Those compressor components are a separate product category, not required accessories or interchangeable parts for these Timbren SES kits.

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