Air Flow Research AFR 3670 BBC 300 CFM CNC Cylinder Heads Pair with 2.300 Intake Valves and Aluminum Construction

The Air Flow Research AFR 3670 Big Block Chevrolet (BBC) CNC-machined cylinder heads are engineered for high-performance applications, providing excellent airflow and durability. Designed for use with BBC engines, these assembled heads feature 2.300-inch intake valves and 1.880-inch exhaust valves, optimized for maximum airflow and power output. Constructed from lightweight aluminum, they help reduce overall engine weight while maintaining strength and heat resistance. The heads include 112 cc combustion chambers and 300 cc intake runners, making them suitable for a range of high-performance street and racing builds. The heads are equipped with 1.625-inch valve springs, ensuring reliable valve operation at high RPMs. These cylinder heads are assembled and ready for installation, providing a straightforward upgrade to enhance your engine's performance and efficiency. Their design ensures compatibility with various aftermarket components, making them a versatile choice for serious enthusiasts seeking reliable horsepower gains and improved airflow. Whether for street performance or racing applications, these AFR 3670 heads deliver precision craftsmanship and proven performance benefits. Note that these heads are not air restricted and are suitable for applications requiring unrestricted airflow. They are not limited to truck freight shipping, making them accessible for a broad range of automotive projects.

Features:

• Constructed from lightweight aluminum for reduced engine weight and heat resistance

• Includes assembled heads with 2.300-inch intake valves and 1.880-inch exhaust valves

• Designed for Big Block Chevrolet engines with 112 cc chambers and 300 cc intake runners

• s 1.625-inch valve springs for high-RPM valve operation

• CNC-machined for precise airflow optimization and performance enhancements