BBC 355cc CNC Pro-1 Head 121cc R/P 2.30/1.88 Assm

The BBC 355cc CNC Pro-1 Head 121cc R/P 2.30/1.88 Assm by Dart is designed for big-block Chevy engine builders who are looking to enhance performance through improved airflow and combustion efficiency. This product is ideal for both street machines and race-prepped motors, providing the precision engineering necessary to unlock additional horsepower and torque across the RPM range.

This assembled cylinder head features a 355cc intake runner volume and a 121cc combustion chamber, both optimized for efficient airflow and combustion. The CNC porting process ensures that material is removed with precision, minimizing turbulence and maximizing velocity through the induction tract. The aggressive valve sizes of 2.30 inches for the intake and 1.88 inches for the exhaust are tailored for high-RPM performance.

Engine builders upgrading their 427, 454, or other big-block Chevy platforms will find this head particularly beneficial. The "R/P" designation indicates that it comes fully assembled with valves, springs, and related hardware, making installation straightforward and eliminating the need for additional valve seat work. This product is a reliable choice for those seeking consistent performance gains in their builds.