1939–1948 Chevrolet Passenger Car NOS Lower Control A-Arm Bumper Set #3661888

Available for sale is a genuine General Motors New Old Stock (NOS) Lower Control A-Arm Bumper Set, GM part number 3661888, designed for select 1939–1948 Chevrolet passenger car applications. This original GM service replacement component is a rare and highly desirable find for restorers seeking factory-correct front suspension parts for their classic Chevrolet restoration.

Chevrolet passenger cars produced between 1939 and 1948 represent an important era in American automotive history. From the pre-war Master Deluxe models through the post-war Fleetmaster and Stylemaster series, these vehicles were known for their durability, comfort, and dependable engineering. Today, they remain popular among collectors and enthusiasts who appreciate their timeless styling and historical significance.

The lower control arm bumper, commonly referred to as an A-arm bumper or suspension stop bumper, is an important component of the front suspension system. Its primary purpose is to cushion suspension travel and prevent metal-to-metal contact when the suspension reaches its designed limits. This helps protect suspension components from excessive impact while maintaining proper ride quality and vehicle control.

Over time, original rubber bumpers can deteriorate due to age, environmental exposure, heat, and normal wear. Cracking, hardening, flattening, or complete deterioration can lead to increased suspension noise, harsher ride characteristics, and accelerated wear of surrounding suspension components. Replacing worn bumpers is a key part of any quality suspension restoration.

This bumper set is a true New Old Stock (NOS) GM service replacement part. Manufactured by General Motors during the original service era and never installed on a vehicle, it retains the factory specifications, materials, and engineering standards intended for Chevrolet passenger car applications.

Unlike many modern reproduction components, genuine NOS GM suspension parts provide authentic fit, original material quality, and factory-correct appearance. For restorers seeking concours-level accuracy or factory-original restoration results, NOS components remain the preferred choice.

Proper suspension maintenance is essential not only for preserving originality but also for ensuring safe and predictable vehicle operation. Correct suspension bumpers help maintain the intended function of the control arm assembly while reducing stress on related steering and suspension components.

Whether you’re restoring a pre-war Chevrolet sedan, a Special Deluxe coupe, a Fleetline fastback, or a post-war Fleetmaster, these lower control arm bumpers provide a dependable and authentic restoration solution.

As original Chevrolet suspension service parts continue to become increasingly difficult to locate, NOS components such as this bumper set are highly sought after by collectors, restoration professionals, and classic Chevrolet enthusiasts.

Product Features

• Genuine General Motors New Old Stock (NOS) part
• GM Part Number: 3661888
• Lower Control Arm (A-Arm) Bumper Set
• Original GM service replacement component
• Designed for Chevrolet passenger car front suspension systems
• Cushions suspension travel
• Helps prevent metal-to-metal contact
• Supports proper ride quality and suspension operation
• Never installed on a vehicle
• Ideal for restoration and concours-quality projects

Vehicle Compatibility

Fits select Chevrolet passenger car models, including:

• 1939 Chevrolet Passenger Cars
• 1940 Chevrolet Passenger Cars
• 1941 Chevrolet Passenger Cars
• 1942 Chevrolet Passenger Cars
• 1946 Chevrolet Passenger Cars
• 1947 Chevrolet Passenger Cars
• 1948 Chevrolet Passenger Cars

Including various Master Deluxe, Special Deluxe, Fleetmaster, Fleetline, Stylemaster, coupe, sedan, convertible, and wagon applications where applicable.

Buyers should verify fitment before purchase.

Condition

This bumper set is offered in New Old Stock (NOS) condition. The components have never been installed and remain original GM service replacement parts. Due to decades of storage, minor shelf wear, packaging marks, age-related cosmetic imperfections, or surface aging may be present.

Please review all available photographs carefully to determine the exact condition of the items being offered.

For collectors and restoration enthusiasts seeking authentic GM suspension components, this 1939–1948 Chevrolet Passenger Car NOS Lower Control A-Arm Bumper Set #3661888 represents an excellent opportunity to restore proper suspension performance while preserving the originality, reliability, and value of your classic Chevrolet restoration.