New 4.3 GM Chevrolet Cylinder Head # 113 Casting

Bolt Down Style Rockers

Introducing our New 4.3L GM Chevrolet Cylinder Head #113 Casting, a versatile solution designed for automotive applications. These high-quality cylinder heads are compatible with 4.3L GM Chevrolet engines, as well as S10, Sonoma trucks, and Astro Vans, ensuring reliable performance and durability across all platforms.

Featuring the precision #113 casting, these cylinder heads come preloaded with valves and springs for an effortless installation. Built to meet OEM standards, they are perfect for replacing worn components or upgrading your engine for enhanced longevity. With superior resistance to marine corrosion and the durability needed for road use, these heads are the perfect choice for various applications.

The 4.3L GM Chevrolet 113 casting cylinder heads are an essential component of one of the most reliable and versatile V6 engines ever built. Known for their excellent performance and durability, these cylinder heads are designed to optimize the airflow and combustion process, resulting in smooth engine operation and improved power output. The 113 casting is renowned for its precise engineering, ensuring a perfect fit and superior compatibility with a variety of GM vehicles, including popular models like the S10, Sonoma, and Astro Van, as well as marine applications such as Mercruiser engines.

One of the standout features of the 4.3L V6 engine is its balance of power and efficiency, and the 113 casting cylinder heads play a crucial role in achieving that balance. Whether you’re tackling daily driving, towing, or marine adventures, these heads are built to handle it all, providing excellent performance and longevity.

Designed to withstand the toughest conditions, from long drives to heavy loads, these cylinder heads help keep your engine running smoothly, ensuring optimal combustion and reliability. For those looking to maintain or upgrade their GM 4.3L engine, the 113 casting cylinder heads offer the perfect combination of durability, performance, and versatility.

Key Features:

• Fits 4.3L GM Chevrolet S10, Sonoma trucks, and Astro Vans
• Precision #113 casting for exact OEM fit
• Fully loaded with valves and springs for easy installation
• Engineered for durability for on-road use
• Ideal for engine rebuilds
• Core Return Required

Applications:

• 4.3L GM Chevrolet engines
• Compatible with GM S10, Sonoma trucks, and Astro Vans

ASTRO 00-05 (4.3L)
BLAZER S10/JIMMY S15 00-05 (6-262, 4.3L)
BRAVADA 00-01 (6-262, 4.3L)
ENVOY 00 (6-262, 4.3L)
EXPRESS 1500 VAN 03-14 6-262 (4.3L);
EXPRESS 2500 VAN 03-06 6-262 (4.3L);
ISUZU HOMBRE 00 6-262 (4.3L)
S10/S15/SONOMA 00-03 4.3L
S10/S15/SONOMA 04 (4.3L)
SAFARI (GMC) 00-05 (4.3L)
SAVANA 1500 VAN 03-14 6-262 (4.3L);
SAVANA 2500 VAN 03-06 6-262 (4.3L);
SIERRA 1500 PICKUP 00-06 4.3L
SIERRA 1500 PICKUP 07 classic style (creased door skin), 4.3L
SIERRA 1500 PICKUP 07 new style (smooth door skin), 4.3L
SIERRA 1500 PICKUP 08-13 4.3L
SILVERADO 1500 PICKUP 00-06 4.3L
SILVERADO 1500 PICKUP 07 classic style (creased door skin), 4.3L
SILVERADO 1500 PICKUP 07 new style (smooth door skin), 4.3L
SILVERADO 1500 PICKUP 08-13 4.3L

4.3L GM Chevrolet Cylinder Head

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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