Note: This is ONLY for casting number # 788 

Please confirm your casting number prior to ordering!

Upgrade your engine’s performance with the Remanufactured GM Ecotec 788 Cylinder Head, now with a head gasket set, bolts, water pump, and timing set for easy installation. Designed for 2.2L and 2.4L DOHC Ecotec engines, this high-quality replacement part enhances engine performance and reliability. It fits GM vehicles equipped with Ecotec engines that need a trusted cylinder head replacement.

Key Features of the GM Ecotec Cylinder Head:

• Casting Number: 788
• Fits:AURA 07-08 2.4L
  AURA 09 2.4L, California emission, w/o PZEV; (opt NU5)
  AURA 09 2.4L, Federal emissions (opt NT7)
  COBALT 06-08 2.4L
  COBALT 09-10 2.2L, California emissions (opt NU1)
  COBALT 09-10 2.2L, Federal emissions (opt NT7)
  G5 07-08 2.4L
  G5 09-10 (2.2L), California emissions, opt NU1
  G5 09-10 (2.2L), Federal emissions (opt NT7)
  G6 06-08 2.4L
  G6 09-10 2.4L, w/o California emissions
  HHR 06-11 2.4L
  HHR 09-11 2.2L
  ION 06-07 2.4L
  MALIBU 08 new style (emblem in bumper cover), 2.4L
  MALIBU 09 2.4L, VIN 5 (8th digit, opt LAT)
  MALIBU 09-10 2.4L, VIN 0 (8th digit, opt LE9)
  MALIBU 09-10 2.4L, VIN B (8th digit, opt LE5), w/o opt NU6
  MALIBU 10 2.4L, VIN 5 (8th digit, opt LAT, Hybrid)
  MALIBU 10 2.4L, VIN Z (8th digit, opt LAT, Hybrid)
  MALIBU 11-12 2.4L, VIN 1 (8th digit, opt LE5), w/o PZEV
  MALIBU 11-12 2.4L, VIN U (8th digit, opt LE9)
  MALIBU 12 2.4L, VIN 0 (8th digit, opt LE5), w/o PZEV
  PURSUIT 06 2.4L
  SKY 07-10 2.4L (VIN B, 8th digit, 4-146)
  SOLSTICE 06 (2.4L, VIN B, 8th digit, 4-146)
  SOLSTICE 07-10 2.4L (VIN B, 8th digit, opt LE5)
  VUE 07 2.4L (opt LAT)
  VUE 08-10 2.4L
• Engine Compatibility: 2.2L and 2.4L DOHC Ecotec engines
• Head Gasket Set, Bolts, Water Pump & Timing Set Included: Comes complete with necessary components for hassle-free installation.
• Durability: This remanufactured cylinder head meets OEM standards, ensuring optimal performance and longevity.
• Core Return Required: Please return your old cylinder head to ensure an efficient and cost-effective solution.

Ordering Information:
When placing your order, include the 8th digit of your VIN to verify compatibility with your engine model.

The GM Ecotec 788 Cylinder Head with head gasket set, bolts, water pump, and timing set is a reliable solution for replacing worn-out or damaged cylinder heads. It is remanufactured to deliver superior performance, whether you are replacing an old part or upgrading to enhance engine efficiency. This part fits perfectly and improves overall engine performance, restoring your vehicle’s power and reliability.

Why Choose a Remanufactured Cylinder Head?
Our remanufactured cylinder heads undergo rigorous testing and refurbishment to meet or exceed OEM specifications. This ensures you receive a part that performs like new, while extending your vehicle’s engine life and enhancing its efficiency.

The Benefits of Replacing Your Cylinder Head:
Replacing your cylinder head with a high-quality remanufactured part restores your engine’s power, performance, and reliability without the high cost of a brand-new part.

Heavy Duty Parts Company – Core Returns Policy:
At Heavy Duty Parts Company, core returns are essential to our ability to provide high-quality, cost-effective cylinder heads to our customers. These returned cores supply essential components, such as keepers, springs, and retainers, which are critical to engine performance.

Heavy Duty Parts Company – Core Returns Policy

Effective December 17, 2025

At Heavy Duty Parts Company, core returns are essential to our ability to provide high-quality, cost-effective cylinder heads. Returned cores supply critical components—such as keepers, springs, and retainers—that are vital to proper engine performance and allow us to maintain OEM-level quality.

No Upfront Core Charge

Unlike many suppliers, we do not charge a core fee upfront. Instead, we rely on customers to return their used cores within the required timeframe.

Core Return Requirements

• Cores are due within 30 days of the purchase date

• If a core is not returned within 60 days, the product warranty is void

• Unreturned cores will be charged as follows:

  • Cylinder heads under $600: $200 per unreturned core

  • Cylinder heads $600 and above: $400 per unreturned core

Customers needing additional time may contact us to request an extension. Approved extensions will prevent core charges from being applied.

Core Return Process

Cylinder heads are shipped with prepaid core return labels included in packets attached to the outside of each box. If labels are missing, customers should contact us for replacements prior to returning the core.

Core Eligibility

Some cylinder heads do not require a core return. In certain cases, core requirements may be waived at our discretion.

Why Core Returns Matter

• Reused core components help maintain OEM-quality standards

• Core returns allow us to keep pricing competitive

• Recycling cores supports sustainability by reducing waste and conserving resources

This policy applies to all purchases made on or after December 17, 2025.

Send Back All Components

To ensure the quality and integrity of our remanufacturing process, we ask that you return all components that were originally included with your new cylinder head. This includes items such as:

• Rocker arms
• Camshafts (if applicable)
• Any other hardware that came with your purchase

Easy & Free Core Return Process

• Each purchase includes a prepaid core return label in a plastic sleeve on the box.
• Simply pack your core with all included components, attach the label, and drop it off with the carrier—no extra cost to you.
• Returned cores undergo inspection and recycling, ensuring maximum efficiency.

Customer Partnership & Sustainability

By returning your core and its components, you help maintain a reliable supply chain, ensuring we can continue offering top-quality products at the best prices. This process not only benefits your wallet but also contributes to a greener and more efficient automotive industry.

We appreciate your support in keeping our business and the industry running smoothly!

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