Pair 3.8L GM Non-Supercharged Heads – Cast Iron Cylinder Heads

Product Description:

Upgrade your GM engine with GM Non-Supercharged Heads, designed for naturally aspirated GM 3800 engines. These high-performance cast iron cylinder heads offer improved airflow, better engine power, and long-lasting durability. Perfect for anyone looking to enhance the performance of their GM 3800 engine, these GM Non-Supercharged Heads will provide the extra edge needed for daily driving and performance builds. A core return is required for this purchase.

Key Features of GM Non-Supercharged Heads

• Precision Engineering: Optimized for enhanced airflow and performance in naturally aspirated applications.
• Cast Iron Construction: Designed to withstand high temperatures and extreme engine conditions.
• Enhanced Airflow: Increases intake and exhaust flow, improving engine performance.
• Perfect Fit for GM Engines: Compatible with GM 3800 naturally aspirated vehicles.

Performance Benefits of GM Non-Supercharged Heads

• Increased Power: Improves horsepower and torque for better engine performance.
• Better Throttle Response: Delivers quicker acceleration and smoother engine operation.
• Durable and Reliable: Built for extreme conditions, providing long-lasting durability.
• Improved Engine Efficiency: Boosts fuel efficiency and power output for naturally aspirated engines.

3.8L GM Non-Supercharged Heads Fitment Data

These cylinder heads fit the following GM vehicles:

• Pontiac Grand Prix (1997-2008)
• Pontiac Firebird (1995-2000)
• Pontiac Bonneville (1995-2000)
• Chevy Monte Carlo (2000-2003)
• Chevy Impala (2000-2004)
• Chevy Camaro (1995-2002)
• Buick Regal (1996-1998)
• Buick Park Avenue (1995-2005)
• Buick Lucerne (2006-2008)
• Buick LeSabre (1996-2005)
• Buick Lacrosse (2005-2009)
• Buick Allure (2007-2009)

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!

Why Choose GM Non-Supercharged Heads?

These GM Non-Supercharged Heads are perfect for those who want to maximize the potential of their naturally aspirated GM engine. Whether you’re replacing old, damaged heads or upgrading to a more powerful setup, these heads offer improved airflow, more power, and long-term durability. Upgrade your GM 3800 engine today for enhanced throttle response and superior performance.

Shipping Information:

We ship to the lower 48 states only, with fast and reliable delivery to ensure your project stays on schedule.

Warranty Information:

The cylinder heads will come with a two year unlimited mileage warranty.

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