1. Pistons, Rings, Rods & Parts Engines Components For Sale
  2. sku: 12435248152048623
  3. FORD C9AZ-6140-A

FORD MOTOR CO C9AZ-6140-A Nos Piston Pin Spiral Locks Co. 820-S

fits model: 429, Boss. make: Ford. year: 1969–2016.

C9az-6140-a Ford Motor Co. Nos Early 1969 Boss 429 820-s Piston Pin Spiral Locks Nib 16

( Brand: Ford Motor Co ), ( Manufacturer Part Number: C9AZ-6140-A ), ( Type: Piston Ring ), ( Items Included: Retainers ), ( Vintage Part: Yes )

Review FORD MOTOR CO Co. Nos Early Piston Pin Spiral Locks Nib fits BOSS 429 1969–2016

Ford Motor C9AZ-6140-A NOS 1969 Boss 429 820-S Piston Pin with Spiral Locks - 16

Step back into the golden era of automotive performance with the authentic Ford Motor C9AZ-6140-A NOS (New Old Stock) 1969 Boss 429 820-S Piston Pin with Spiral Locks - 16. This is an exceptional collectible for enthusiasts and restorers of the iconic muscle cars of the '60s and '70s.

The Ford Boss 429 engine, affectionately known as the "Cobra Jet," was a high-performance V8 engine that was part of the Ford Windsor series. The C9AZ-6140-A piston pin is a crucial component of this legendary engine, designed to provide exceptional durability and performance.

This particular NOS piston pin is marked as a 1969 Boss 429 820-S unit, indicating its specific application and size. The 820-S designation refers to the piston's design, which was used in high-performance applications to withstand the increased stresses of high-RPM operation.

One of the standout features of this piston pin is the spiral lock design. This ingenious feature enhances the pin's grip within the piston, reducing the risk of failure under extreme conditions. The spiral lock design is a testament to Ford's engineering prowess during this era.

The piston pin measures 16 units, ensuring a precise fit for your Boss 429 engine. Each NOS piston pin is individually sealed and has been stored in ideal conditions, maintaining its original integrity.

When you install this authentic Ford Motor C9AZ-6140-A NOS 1969 Boss 429 820-S Piston Pin with Spiral Locks - 16, you're not just installing a part; you're installing a piece of automotive history. This is more than just a component it's a connection to a bygone era of raw power and unparalleled performance, and a testament to Ford's commitment to excellence.

Don't miss out on the opportunity to own a genuine Ford Motor C9AZ-6140-A NOS 1969 Boss 429 820-S Piston Pin with Spiral Locks - 16. Restore your muscle car to its former glory or add a piece of automotive history to your collection today.

The Ford C9AZ-6140-A NOS 1969 Boss 429 820-S Piston Pin with Spiral Locks is a highly sought-after automotive part, especially among Ford Mustang enthusiasts. Here are some pros and cons to consider before making a purchase:

Pros:

1. Authenticity: This is a NOS (New Old Stock) part, meaning it was manufactured and stored by Ford but never installed on a car. This guarantees its originality and quality.

2. Performance: The Boss 429 engine is known for its power and performance, and the 820-S piston pin with spiral locks is a crucial component that contributes to its durability and efficiency.

3. Rarity: As a NOS part, this is a rare find, making it a valuable addition to any collector's inventory.

4. Quality: NOS parts are often in excellent condition due to their storage and lack of use over the years.

Cons:

1. Cost: Due to its rarity and desirability, this part can be quite expensive.

2. Availability: NOS parts are not always readily available and may require extensive searching and waiting.

3. Fitment: While this part is original to the 1969 Boss 429 engine, it's essential to ensure it fits correctly with your specific car.

4. Installation: Installing a piston pin requires specific tools and expertise, which may add to the overall cost and complexity of the project.

Conclusion:

The Ford C9AZ-6140-A NOS 1969 Boss 429 820-S Piston Pin with Spiral Locks is a high-quality, performance-enhancing part that adds significant value to any 1969 Boss 429 Mustang. However, its rarity and high cost may make it a less practical choice for some enthusiasts. If you're serious about restoring or maintaining a high-performance classic, and have the budget for it, this part could be an excellent investment. For casual enthusiasts or those on a tighter budget, it may be more practical to consider reconditioned or aftermarket alternatives.

Details:

Boss Performance. NOS Ford new condition. If you can't wait, don't order. Genuine Ford engine parts.

NOS Ford C9AZ-6140-A piston pin spiral lock retainers. One set of 16 pieces only. 1969 Boss 429 Mustang early 820-S engines only. Performance, Racing, Collector car parts.

Allow plenty of shipping time. New in original Ford box. Very minor shelf wear on boxes only. Extra spare service parts that's on you.

Know your Boss 429 engine application.

part #: c9az6140 prices

  • $48.92-$675.00

specifications pistonringro:

  • for models: 429, Boss
  • for makes: Ford
  • for years: 1969-2016
  • brand: Ford Motor Co
  • mpn: C9az-6140-a
  • type: Piston Ring
  • items included: Retainers
  • vintage part: Yes

seller pistonringro:

  • city: Spokane, Washington
  • # reviews: 1438
  • rating: 100.0%

returns pistonringro:

  • policy: No Returns

shipping pistonringro:

  • transit: 35-51 Days
  • type: Fixed
  • carrier: USPS
  • service: USPS Priority Mail
  • class: Expedited
  • cost: $12.95

general pistonringro:

  • condition: For parts or not working
  • Car Truck Parts Accessories > Engines Engine Parts > Pistons Rings

offer pistonringro:

  • sold: 0
  • availability: In Stock
  • options: Ship-to-home
  • started: October 29, 2025
  • quantity: 1

payments pistonringro:

  • wallet: Google-pay
  • other
  • credit card: Discover
for models: 429, boss, for makes: ford, for years: 1969-2016, type: piston ring, items included: retainers, vintage part: yes,
category: auto parts > car truck parts accessories > engines engine parts > pistons rings, sku: 12435248152048623,
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5 offers $48.92–$675.00 USD
  • New other (see details). Offer #1 priced at $300.00 + $14.95 shipping estimate = $314.95* total. Please feel free to sod any questions Thanks This is a new old stock Ford boss 429 Mustang piston, I have two total if someone needs another one, but this listing is for one.+$14.95 shipping
  • New. Offer #2 priced at $48.92 + $0.00 shipping estimate = $48.92* total. FREE SHIPPING
  • Used. Offer #3 priced at $675.00 + $35.00 shipping estimate = $710.00* total. Thanks This is a set of 8 boss 429 pistons.+$35.00 shipping
  • For parts or not working. Offer #4 priced at $229.00 + $12.95 shipping estimate = $241.95* total. Know your Boss 429 engine application! Need a book? 1969 Boss 429 Mustang early engines only.+$12.95 shipping
  • New other (see details). Offer #5 priced at $975.00 + $18.75 shipping estimate = $993.75* total. +$18.75 shipping

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