For the consumer who wants the benefits of the best performing cylinder head on the market without breaking the bank TrickFlow introduces its "As Cast" version of their Gen III LSX Cylinder Head. This "As Cast" Cylinder Head shares all of the same valvetrain as its CNC counterpart. The difference is in the intake/exhaust ports. TrickFlow took its CNC port and digitized it into the casting process. This saves time and money and lowers the cost to you!!!!