GM Marine Chevrolet Truck TBI 5.7L Cylinder Head – Casting Numbers #193/217/191

Upgrade your GM Marine or Chevrolet Truck with this remanufactured 5.7L TBI cylinder head, compatible with casting numbers #193, #217, and #191. This cylinder head is designed to fit a variety of GM 5.7L engines, delivering the performance and reliability you need for both marine and truck applications.

Key Features:

• Fitment: Designed for GM Marine and Chevrolet 5.7L TBI (Throttle Body Injection) engines. Perfect fit for engines using casting numbers #193, #217, and #191.
• Precision Build: Remanufactured to OEM specifications, ensuring optimal performance and durability. Ideal for replacing old or damaged heads.
• Superior Performance: Fully loaded with valves and springs, providing excellent airflow and compression for smoother engine performance.
• Multi-Application Use: Compatible with both marine and truck applications, making it a versatile choice for various GM vehicles and watercraft.
• Core Return Required

Fitment Data:

BLAZER/JIMMY (full size) 87-91 8-350 (5.7L)
BLAZER/JIMMY (full size) 92-93 (8-350, 5.7L)
BLAZER/JIMMY (full size) 94 8-350 (5.7L)
BROUGHAM 90-92 8-350 (5.7L)
CAPRICE 89-93 8-350 (5.7L)
CHEVROLET 10 PICKUP 87 8-350 (5.7L); (EFI)
CHEVROLET 10 VAN 87-88 8-350 (5.7L); EFI, TH700
CHEVROLET 10 VAN 89-90 8-350 (5.7L); TH700
CHEVROLET 10 VAN 91-94 8-350 (5.7L);
CHEVROLET 10 VAN 95 8-350 (5.7L); gasoline, 4L60E transmission
CHEVROLET 1500 PICKUP 88-91 8-350 (5.7L);
CHEVROLET 1500 PICKUP 92-95 8-350 (5.7L); gasoline
CHEVROLET 20 PICKUP 87-88 8-350 (5.7L); EFI, thru 8500 GVW
CHEVROLET 20 VAN 87-88 8-350 (5.7L); EFI, TH700
CHEVROLET 20 VAN 89-90 8-350 (5.7L); TH700
CHEVROLET 20 VAN 91-94 8-350 (5.7L); thru 8500 GVW
CHEVROLET 20 VAN 95 8-350 (5.7L); gasoline, 4L60E transmission
CHEVROLET 2500 PICKUP 88 8-350 (5.7L); EFI, thru 8500 GVW
CHEVROLET 2500 PICKUP 89-91 8-350 (5.7L); thru 8500 GVW
CHEVROLET 2500 PICKUP 92-95 8-350 (5.7L); gasoline, thru 8500 GVW
CHEVROLET 30 VAN 87-88 8-350 (5.7L); EFI, TH700
CHEVROLET 30 VAN 89-90 8-350 (5.7L); TH700
CHEVROLET 30 VAN 95 8-350 (5.7L); gasoline, 4L60E transmission
CUSTOM CRUISER 92 8-350 (5.7L)
FLEETWOOD 90-93 8-350 (5.7L)
GMC 1500 PICKUP 87 8-350 (5.7L); EFI
GMC 1500 PICKUP 88-91 8-350 (5.7L); (EFI)
GMC 1500 PICKUP 92-95 8-350 (5.7L); gasoline
GMC 1500 VAN 87-88 8-350 (5.7L); EFI, TH700
GMC 1500 VAN 89-90 8-350 (5.7L); TH700
GMC 1500 VAN 91-94 8-350 (5.7L);
GMC 1500 VAN 95 8-350 (5.7L); gasoline, 4L60E transmission
GMC 2500 PICKUP 87-88 8-350 (5.7L); EFI, thru 8500 GVW
GMC 2500 PICKUP 89-91 8-350 (5.7L); thru 8500 GVW
GMC 2500 PICKUP 92-95 8-350 (5.7L); gasoline, thru 8500 GVW
GMC 2500 VAN 87-88 8-350 (5.7L); EFI, TH700
GMC 2500 VAN 89-90 8-350 (5.7L); TH700
GMC 2500 VAN 91-94 8-350 (5.7L); thru 8500 GVW
GMC 2500 VAN 95 8-350 (5.7L); gasoline, 4L60E transmission
GMC 3500 VAN 87-88 8-350 (5.7L); EFI, TH700
GMC 3500 VAN 89-90 8-350 (5.7L); TH700
GMC 3500 VAN 95 8-350 (5.7L); gasoline, 4L60E transmission
ROADMASTER 92-93 (8-350, 5.7L)
SUBURBAN 10 87-88 8-350 (5.7L); EFI
SUBURBAN 1500 87-88 8-350 (5.7L); EFI
SUBURBAN 1500 89-91 8-350 (5.7L);
SUBURBAN 1500 92-95 8-350 (5.7L); (gasoline)
SUBURBAN 20 87-88 8-350 (5.7L); EFI, thru 8500 GVW
TAHOE 95 8-350 (5.7L)
YUKON 92-93 (8-350, 5.7L)
YUKON 94-95 8-350 (5.7L)

Applications:

This cylinder head fits a variety of GM 5.7L engines, making it suitable for multiple marine and Chevrolet truck models.

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!

Additional Information:

• Warranty: Comes with a 2-year warranty, ensuring peace of mind and long-term reliability.
• Shipping: Ships to the lower 48 states only.

This remanufactured GM Marine Chevrolet Truck 5.7L cylinder head is the perfect solution to restore your engine’s performance. With precise fitment for casting numbers #193, #217, and #191, you can count on this product for a seamless replacement that will keep your vehicle or watercraft running smoothly.

GM

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