LS3 416 Black Label FI Long Block

  • Sale
  • $ 11,995.00


Type: LS3 6.8L FI
Displacement: 416 Cubic Inches
Compression Ratio: 9.5:1
Bore x Stroke: 4.070 x 4.000
Rev Limit: 7000 RPM
Crank: Callies Compstar Forged
Rods: Callies H-Beam
Pistons: Mahle Motorsports
Cam: Mast 3-Bolt Core Cam
Heads: Mast Black Label LS3 255 Heads
Valve Springs: Mast Dual

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

Mast Motorsports Handbuilt LS engines feature the best components and are assembled by professional machinist.  All handbuilt engines feature ARP Main Studs, ARP Head Bolts or Studs and a balanced and blueprinted block.  

The LS3 416 Black Labels’ heart and soul is the new 4.065 aluminum block.  The LS3 designation has a Mast Motorsports engineered camshaft that is custom ground on a Mast Motorsports LS3 cam core.  The 416 foundation is a honed and decked LS3 aluminum block with a 4.000” forged Callies Compstar rotating assembly with Mahle pistons that is topped off with Mast Black Label LS3 255 heads. ARP fasteners are used throughout and Mast pushrods ride on GMPP High RPM hydraulic roller lifters.  The LS3 416 Black Label is at the top of a diverse line of Mast Motorsports hand built LS3 based Forced Induction long blocks that are designed for the Hot Rod/Muscle Car market.  The LS3 416 Black LabelFI engine is capable of hitting the 800 horsepower mark and is competitively priced for such a powerful, built for boost long block.