The Iron 408's heart and soul is the new 4.005 iron block. The 408 designation has a Mast Motorsports engineered camshaft that is custom ground on a Mast Motorsports billet cam core. The 408 foundation is a honed and decked LY6 iron block with a 4.000” forged Callies rotating assembly. It includes Mahle or Diamond forged pistons and is topped off with CNC LS3/L92 or Mast Black Label heads and a LS3 intake manifold. ARP fasteners are used throughout and Mast pushrods ride on LS7 hydraulic roller lifters. The Iron 408 is just one of a diverse line of Mast Motorsports hand built Turnkey Crate Engines that are designed for the Hot Rod/Muscle Car and Offroad markets. The Iron 408 starts at the 500 horsepower mark and is competitively priced for such a powerful complete fuel injected turnkey crate engine.