LS6, L78, L72, 454 427 396 Big Block Chevy Head Rectangular Port Closed Chamber
Price:
$725
Ships From:
Toledo, Washington, US
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The product is a Chevrolet Big Block Chevy rectangular port cylinder head with the manufacturer part number 3919840, designed for engines from the late 60's to early 70's such as the L78/396, L72/427, and LS6/454 motors. Date code is A16 9. Closed chamber 107cc with 2.19/1.88 inch valves. This cylinder head is a crucial component in the engine's performance, providing a rectangular port design that offers improved airflow and efficiency for those specific engine models. Made by Chevrolet, this cylinder head is a reliable and quality part for restoring or upgrading a classic Chevy engine. This is fir one complete used head pulled off a running motors in February 2026. No warranty. Sold as is. See pictures for condition.
- Brand: General Motors
- Type: Cylinder Head
- Manufacturer Warranty: no
- Manufacturer Part Number: 3919840
- Material: Cast Iron
- Vintage Part: Yes
- Country of Origin: United States
- Performance Part: Yes
