Iron 408 SS Long Block

  • Sale
  • $ 9,495.00


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 forged pistons and is topped off with CNC LS3/L92 heads. 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 SS makes 550 horsepower and is competitively priced for such a powerful complete long block

Type: LY6 6.7L
Displacement: 408 Cubic Inches
Compression Ratio: 11:1
Bore x Stroke: 4.005 x 4.000
Rev Limit: 7000 RPM
Crank: Callies Forged
Rods: Callies H-Beam
Pistons: Mahle Motorsports
Cam: Mast Custom 3-Bolt Billet Core Cam
Heads: LS3/L92
Valve Springs: Mast Motorsports Beehive

*All hp numbers will be within 2% of the advertised number.