Engine Piston Kit - ACDelco (12646457)

ACDelcoMPN12646457
Sale Price$82.31
Description : GM Genuine Parts Engine Pistons are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE). ⚠ WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
engine-piston;engine-pistons;

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Product Details

Description

GM Genuine Parts Engine Pistons are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE). ⚠ WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
engine-piston;engine-pistons;

Part Number (MPN)
12646457
Brand
SKU
12646457
UPC / GTIN
195491147225 / 00195491147225
Condition
New
Other Names
12646457
Brand
GM Genuine Parts
Assembly Lubricant Included
No
Bore Diameter (in)
3.4646
Bore Diameter (mm)
88
Features & Benefits - Bullet 1
Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
Features & Benefits - Bullet 2
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors.
Features & Benefits - Bullet 3
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
Features & Benefits - Bullet 4
GM regularly updates production and service part designs to integrate new materials and technologies
Grade Type
Standard
Meets or Exceeds Original Equipment Manufacture Specifications
Yes
Oversized
No
Piston Head Type
Flat
Piston Material
Aluminum
Piston Outside Diameter
3.4283<br />87.08
Piston Pin Incorporated Bearings
No
Piston Pin Inside Diameter
0.4528<br />11.5
Piston Pin Length
2.1591<br />54.84
Piston Pin Material
Steel
Piston Pin Outside Diameter
0.8031<br />20.4
Piston Rings Included
No
Programming Required
No
Ring Material
Steel

YearMakeModelBody & TrimEngine & Transmission
Vehicle #1
Year
Make
Model
Body & Trim
Engine & Transmission

BrandEquivalent Part Numbers

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BrandEquivalent Part Numbers
GM
12646457

Shipping Policy

AyoParts.com Shipping Policy

At AyoParts, we’re committed to delivering high-quality automotive parts with speed, reliability, and care. Our mission is to ensure you get the parts you need to keep your vehicle running at its best—quickly, efficiently, and hassle-free.



Order Processing

- Fast Handling: In-stock orders are processed and shipped within 24 hours of placement.

- Weekend Orders: Orders placed on weekends or holidays will be processed on the next business day.

- Manufacturer Orders: If an item is not in stock and needs to be ordered from the manufacturer, it typically arrives at our facility within 2–3 business days before being shipped to you. Some items may take up to 5–6 business days, and we’ll ship them immediately once they arrive.

Typical Fulfillment Time: Most orders are shipped complete within 2–3 business days.


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- Ground Shipping: Standard ground delivery usually takes 2–7 business days, depending on your location.

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- Transit Times: While we strive to deliver quickly, ground and oversized shipment transit times are not guaranteed.


International & Special Orders

- Domestic Shipping Only: AyoParts currently ships within the United States only.

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- Backorders & Discontinued Items: If a part is backordered or discontinued, our team will make every effort to locate a replacement or alternative part as quickly as possible.


Drop Ship Orders

- Some items may ship directly from the manufacturer or supplier instead of our warehouse.

- Drop-ship items typically ship within 1–2 business days once availability is confirmed.

- This process allows us to offer a broader selection of parts and competitive pricing for our customers.

At AyoParts, we take pride in providing dependable service, quality parts, and exceptional customer care. Your satisfaction is always our top priority.

Check out our Shipping Policy for more details.

Return Policy

AyoParts.com Return & Cancellation Policy

At AyoParts, your satisfaction is important to us. If you need to return an item, please review the guidelines below to ensure a smooth and efficient process.

Return Policy

- How to Start a Return: Please contact our customer service team to arrange any return before sending items back.

- Invoice Required: A copy of your original invoice must be included with all returned parts.

- Restocking Fee: All approved returns are subject to a 15% restocking fee.

- Condition Requirements:

- Electrical parts are not returnable under any circumstance.

- Used, installed, or test-fitted parts cannot be returned.

- All items must be returned in their original packaging.

- Returned parts must be new, unused, and in resalable condition.

- Inspection & Refusal Rights: We reserve the right to refuse or return any part that has been installed, used, damaged, or does not meet the above criteria.

- Return Window: All return requests must be made within 10 days of receiving your order.

- Refunds will be issued up to 30 day after inspection of the returned items.



Cancellation Policy

- Before Shipment: Orders or items may be cancelled at any time before they ship and leave our facility.

- Special Orders: If a cancelled part was special ordered from the manufacturer, a 15% return fee may apply.

At AyoParts, we aim to make every transaction straightforward and transparent. If you have any questions about your return or cancellation, please contact our support team—we’re here to help.

Check out our Return Policy for more details.

ACDelco

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At AYO Parts, we’re driven by one mission — to get you the right aftermarket parts, fast. Whether you’re a professional mechanic or a DIY enthusiast, we offer a wide range of high-quality, reliable components for cars, trucks, and SUVs.

Our team combines deep industry expertise with a passion for service, ensuring you get accurate fitment, competitive prices, and quick delivery. We partner with trusted brands to help you keep vehicles performing at their best — without the hassle.

From everyday maintenance items to hard-to-find components, AYO Parts​ is your go-to source for aftermarket automotive solutions.