ENGINE PRO RACING Chevrolet LS3,L76,L77,L98 Rectangle intake ports, 11 degree OEM head bolt desig

Comprehensive Specifications of the OE 4 Head Bolt Design

The OE 4 Head Bolt Design is engineered with precision to optimize engine performance through a combination of advanced materials and meticulously calculated dimensions. Constructed from lightweight aluminium, it features a combustion chamber volume of 69cc and an intake runner volume of 255cc, allowing for efficient airflow. The intake port measures 2.580″ by 1.285″, while the exhaust port is sized at 1.685″ by 1.795″, enhancing both intake and exhaust dynamics.

With an intake valve size of 2.165″ and an exhaust valve size of 1.600″, the head supports robust airflow characteristics, as evidenced by the flow data measured at 28″ (CFM). The design also includes a valve stem diameter of 8.00mm, a valve length of +0.500″, and a valve angle of 11 degrees, all crafted to improve engine responsiveness and power output. Additionally, innovative materials like manganese bronze for valve guides ensure durability under high-performance conditions, making this head design a top choice for automotive enthusiasts and engineers alike.