Direct-fit motorhome-specific rear shock for 2001–2004 Workhorse W20 and W22 Class A chassis at stock height. Features Bilstein's Comfitrac® piston. Also fits Holiday Rambler Vacationer and Monaco Coach built on W20/W22. Stem upper / eyelet lower. Made in the USA.
The Bilstein 24-186537 B6 4600 Series Rear Shock Absorber is a direct-fit, motorhome-specific upgrade for the Workhorse W20 and W22 Class A chassis — covering the 2001 through 2004 model years. The Workhorse chassis was widely used by major Class A motorhome builders during this era, and many Holiday Rambler Vacationer and Monaco Coach motorhomes from this period ride on the W20/W22 platform.
Worn rear shocks on the W20/W22 chassis manifest as excessive rear-end bounce, instability under the weight of the motorhome body, and increased sway that makes highway driving tiring and reduces safety margins. The 4600 series, combined with Bilstein's Comfitrac® piston technology, is precisely application-tuned to handle the unique demands of this chassis — delivering dramatically improved rear stability, reduced sway, and the settled, composed ride quality that makes long trips comfortable and safe.
Application-valved for the W20/W22 Class A chassis — not a generic truck shock, but a dedicated motorhome rear suspension upgrade
Bilstein's motorhome-specific piston design delivers superior high-frequency comfort and rear stability on long highway runs
In addition to the base W20/W22 chassis, fits Holiday Rambler Vacationer and Monaco Coach La Palma and Monarch built on this platform
Designed, engineered, and manufactured in the USA. Backed by Bilstein's limited lifetime warranty
2001–2004 Chassis Only: This shock is for the Workhorse W20/W22 chassis from 2001 through 2004. For the later W20/W22/W24 chassis (2005–2009), the rear shock is Bilstein 24-268097. RSR Equipped Models: Amazon confirms this fits models including RSR (Rear Super Roll) equipped variants of the Holiday Rambler Vacationer and Monaco Coach. 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.
In The Box (Qty: 1 Shock Absorber): • Bilstein 24-186537 Rear Shock Absorber • Blue Protective Boot • Black Rubber Bushings NOT Included: • Mounting Hardware • Second shock (sold individually — order qty 2 for a complete rear pair)
24-186629 — Front B6 4600 shock for 2001–2004 Workhorse W20/W22 chassis (pairs with this rear shock) 24-268097 — Rear B6 4600 shock for 2005–2009 Workhorse W20/W22/W24 chassis (next generation) 24-153249 — Front B6 4600 shock for 2005–2009 Workhorse W20/W22/W24 chassis (next generation front) For a complete W20/W22 motorhome suspension upgrade, pair front (24-186629) and rear (24-186537) together. Replacing all four shocks delivers the most balanced improvement in ride quality and stability.
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 24-186537 fits the following Class A motorhome chassis and brands built on the W20/W22 platform at stock ride height. Sold individually — order two for a complete rear replacement.
⚠️ Fitment cross-referenced across Amazon, SuperSteer Parts, ShockWarehouse, and Shock Surplus. For the 2005–2009 Workhorse W20/W22/W24 chassis, order Bilstein 24-268097 (rear) and 24-153249 (front) instead. RV brand fitment is representative — other coaches built on the W20/W22 chassis during this period may also be compatible.