At CS of MD West, our commitment to excellence is reflected in every part we offer. We’ve dedicated ourselves to supporting collectors, restorers, and just anyone who loves some of the greatest cars ever made in preserving the spirit and performance of classic Corvettes. That means only providing NOS Corvette parts that meet a higher standard—ours. If we wouldn’t install a part on our own Corvette, then we won’t offer it to you.
New additions to our inventory meet this standard. Each was selected for its authenticity, quality, and preservation of factory-correct detail. Each can play a vital role in performance, preservation, and authenticity, all towards making your Corvette what you want it to be.
1973–1975 Corvette 350 Small Block NOS Fan Shroud Extension
In the mid-70s, GM produced a very specific cooling setup for small block engines that required a unique fan shroud extension. The NOS fan shroud extension we carry (GM part number 331870) was specifically designed to improve cooling efficiency by guiding air more effectively through the radiator. On cars with air conditioning or operating in warmer climates, this subtle component made a real difference in keeping the small block V8 at optimal temperatures.
This part was originally installed on 1973, 1974, and 1975 small block Corvettes. Unique to those years, it’s not interchangeable with earlier or later models.
Ours is not a reproduction or aftermarket alternative—it’s true GM NOS, exactly as it came from the factory, including the original molded black plastic material, unaltered structure, and correct mounting holes.
Because we specialize in factory-original parts, we don’t compromise. Each fan shroud extension we offer has been inspected for integrity, warping, and sun exposure—common issues with NOS plastic components stored improperly. We only offer units that are structurally sound, because we know how crucial this part is to overall engine cooling and, ultimately, reliability.
1984–1996 Corvette NOS Door Window Outer Seals (GM Pair)
As Corvette engineering evolved in the 1980s and 90s, weather sealing became more sophisticated. The outer window seals (or beltline weatherstrips) for 1984 through 1996 Corvettes were designed not only to block water and debris but also to complement the sleeker window profile and aerodynamic improvements of the C4 generation.
These GM NOS outer window seals represent a critical detail for anyone undertaking a proper restoration or simply seeking to bring their C4 Corvette back to factory condition. Window seals endure wear every time the window moves. Over decades, these components can harden, shrink, or develop micro-cracks—even if the car isn’t driven every day.
The seals we offer are genuine GM parts, never repackaged or rebranded aftermarket items. They maintain the correct contour, molded ends, and fitment for proper window articulation and door alignment. We’ve examined every set before making them available to ensure they are still supple, uncracked, and ready to install.
These NOS Corvette parts come as a matched pair, intended for both the driver and passenger side, ensuring a consistent look and function across both doors. Replacing just one seal often leads to uneven wear and appearance, so offering the matched pair is our way of keeping your Corvette true to its original design.
1965–1979 Corvette NOS Differential Clutch Disc Kit
Among the more overlooked components in drivetrain restorations is the clutch disc kit within the Corvette’s rear differential. Designed to provide limited-slip function in the posi-traction rear, these friction discs engage when one wheel loses traction, redirecting torque to the wheel with more grip. It’s a subtle mechanism, but one that heavily influences how the car handles under power.
We’re proud to offer a genuine GM NOS clutch disc kit, part number 12524505, covering 1965 through 1979 Corvettes. These kits are nearly impossible to source in this condition and are made of a material blend no longer used in modern service parts. GM originally formulated these discs to balance strength and longevity while minimizing chattering and wear.
Many drivers don’t realize that after decades, the original discs can become glazed or simply worn out, degrading the car’s ability to handle sudden throttle inputs or maintain traction under spirited driving. The result is more than just a performance loss—it can change how the entire car feels in corners or on acceleration.
Our kits are unopened, untouched GM originals. Before making them available, we inspect packaging, date codes, and verify the components against factory specs to ensure everything included is as intended. These are not reproduction parts or replacements with “compatible” friction material. They’re authentic GM products designed during the era of your Corvette’s original production.
Our Approach to NOS Corvette Parts
Every NOS Corvette part we offer goes through a detailed evaluation before it makes it into our inventory. We don’t take chances on parts that look the part but haven’t aged well in storage.
NOS doesn’t always mean “perfect”—especially when it comes to rubber, plastics, and friction materials—so we use our decades of experience to separate genuine value from items that haven’t stood the test of time.
We only make parts available if we would use them in our own Corvettes. That’s not just a motto—it’s how we operate. Whether you’re restoring a C3 back to its showroom debut, upgrading a C4’s weather protection, or rebuilding a differential for track-readiness, we take the same level of care you would expect from fellow enthusiasts.
NOS Corvette Parts and More for Corvette Owners in the Know
We don’t aim to carry every part under the sun. Our goal is to provide a focused, carefully selected inventory of NOS Corvette parts that reflect our values. That includes hard-to-find components for specific model years and performance needs, like the fan shroud extension, outer window seals, and clutch disc kits featured here. When we add a part to our inventory, it’s because we know how much it matters and how much it can help classic Corvettes.
Whether you’re deep into a frame-off restoration or maintaining your weekend driver, quality parts make all the difference. At CS of MD West, we offer NOS Corvette parts not just as replacements, but as pieces of Corvette history—built to last and true to form.
We invite you to browse our current NOS inventory and see the difference for yourself.