BBC 345cc BB3 Xtra Head 2.300in/1.880in Assm.

The BRODIX BBC 345cc BB3 Xtra Head 2.300in/1.880in Assembly is a high-flow aluminum cylinder head engineered for big block Chevy engines demanding maximum intake and exhaust efficiency. This assembled unit delivers a 345 cubic centimeter intake volume paired with a 119 cubic centimeter combustion chamber, making it a premium choice for engine builders and performance machine shops seeking verified flow characteristics and bolt-and-run reliability without additional machine work.

The BB3 Xtra design features 2.300-inch intake valves and 1.880-inch exhaust valves—a valve-sizing ratio optimized for the breathing patterns of naturally aspirated and forced-induction big block applications. The 1.645-inch spring seats accommodate modern valve spring rates necessary for high-RPM stability. Angle-plug spark plug configuration improves ignition reliability and allows superior spark positioning relative to the combustion chamber geometry. Aluminum construction reduces overall engine weight while maintaining structural integrity under sustained boost or nitrous oxide use. At 57 pounds, this head is production-ready and requires no additional porting, gasket matching, or valve work before installation.

This cylinder head serves big block Chevy engine builders, vintage drag racing competitors, street performance builders, and machine shops stocking inventory for customer builds. It is equally suited to truck engine restorations, marine engine applications, and crate engine assembly operations where time-to-installation and verified flow efficiency are critical. The BRODIX BB3 Xtra line is recognized in the performance engine market for repeatability and flow consistency across production runs.

Big block Chevy cylinder heads vary widely in chamber volume, valve size, and porting approach. The BB3 Xtra occupies the high-performance segment where 345cc intake volume balances port velocity with absolute flow rate—a proven geometry for engines targeting 450+ horsepower. Buyers evaluating BRODIX heads against conventional or ported-on-demand alternatives should confirm chamber volume, valve diameter, spring seat diameter, and bolt pattern compatibility with their specific block and gasket selection before purchase.