Direct-fit OE upgrade rear shock for 1999–2016 Ford F-250 and F-350 Super Duty with 2WD (RWD) at stock height. Fits SRW and DRW. 46mm monotube nitrogen gas design. 16mm upper / 12.1mm lower eyelet mounts. Made in the USA.
The Bilstein 24-185325 B6 4600 Series Rear Shock Absorber is the 2WD rear shock for the Ford F-250 and F-350 Super Duty — covering an unusually long production span from 1999 all the way through 2016. This single part number serves first-generation and second-generation 2WD Super Duty trucks alike, making it one of the longest-running application fits in the entire 4600 catalog.
Whether your 2WD F-250 or F-350 is a high-mileage work truck, a tow vehicle, a farm hauler, or a commercial fleet unit, worn rear shocks degrade rear axle stability, increase sway under load, and reduce traction on rough roads. The 4600 series is precisely valved for the Super Duty rear suspension to restore and improve all of that — more settled highway composure, better load stability, and the kind of rear-end control that makes towing large trailers feel composed rather than loose.
Fits 2WD F-250 and F-350 Super Duty from 1999 through 2016 — one of the longest single-part fitment spans in the 4600 lineup
Fade-free rear damping under heavy Super Duty towing and payload loads — consistent performance mile after mile
Fits both single rear wheel and dual rear wheel (dually) F-250 and F-350 2WD configurations
Designed, engineered, and manufactured in the USA. Backed by Bilstein's limited lifetime warranty
The 24-185325 is for 2WD (RWD) F-250 and F-350 Super Duty only. The 4WD Super Duty uses a different rear shock due to its different rear suspension geometry and axle packaging. Verify your Super Duty's drivetrain before ordering. Installing the wrong shock for your configuration will result in improper fitment.
Fitment Extends to 2016: Despite the product name listing 1999–2014, multiple sources confirm this shock fits through 2016. Verify fitment for 2015–2016 model year trucks before ordering. Sold Individually: One shock absorber per package. Order qty 2 for a complete rear axle replacement. Stock Height Only: The B6 4600 Series is for stock-height applications only. For lifted Super Duty trucks, see the Bilstein B8 5100 series. Asymmetric Mounts: Upper and lower eyelet sizes differ — 16mm upper and 12.1mm lower. Do not substitute standard same-size eyelet hardware.
In The Box (Qty: 1 Shock Absorber): • Bilstein 24-185325 Rear Shock Absorber • Blue Protective Boot • Black Rubber Bushings NOT Included: • Mounting Hardware (uses existing OEM hardware) • Second shock (sold individually — order qty 2 for a complete rear pair)
24-197779 — Front B6 4600 shock for 1999–2016 F-250/F-350 Super Duty 2WD (pairs with this rear shock) 33-028187 — Front B6 4600 shock for 1999–2004 F-250/F-350/F-450/F-550 Super Duty (all configurations) 33-185347 — Rear B6 4600 for 1999–2004 F-350 Super Duty Single Rear Wheel (SRW) — generation-specific alternative For a complete stock-height 2WD upgrade, pair with 24-197779 front shocks.
Bilstein Official Product Page Bilstein Technical Support: Website: www.bilstein.com Warranty: Limited Lifetime for original purchaser — B6 4600 series gas pressure shocks. Proof of purchase required. See full terms at Bilstein's website.
The 24-185325 fits the following vehicles at stock ride height with 2WD (RWD) drivetrain. Fits both SRW and DRW rear wheel configurations. Sold individually — order two for a complete rear replacement.
⚠️ Fitment cross-referenced across Jack-It, Steeda, Shock Surplus, SD Truck Springs, and Amazon. 2WD only — 4WD Super Duty requires a different rear shock. Confirmed fitment through 2016 by multiple sources, despite the product name listing 1999–2014. Always verify your specific year and drivetrain before ordering.