LS3 Medium Bore | Factory Mast | As Cast Port | Cylinder Head - Pair w/ Valves

Expected Ship Date February 2025 ---->Download the Cylinder Head Spec Sheet<---- ----> Download the Dyno Report Here <---- Introducing the Factory Mast "As Cast" Port Cylinder Head.                                            We launched our Factory Mast product line to deliver an economical product line for our customers.  We completely engineered and manufactured our long standing best in class CNC port into an "As Cast" port.  This new process saves a significant amount of time and manufacturing cost, which is savings we pass down to you. You have come to love the "Black Label" Cylinder heads, but now you can get the same quality at a lower price without SACRIFICING performance. Manufactured using permanent mold technology, this casting is simply an amazing surface finish and quality.   Mast refuses to compromise on materials and methods that may jeopardize longevity, performance, and quality.  When buying Mast Cylinder heads, you are getting the highest level of quality