Click on image to zoom

MTM117-122 - Mast Motorsports L99 416 SS Turnkey Crate Engine (590HP), NO ECM or Harness

This product may require vehicle validation(s) for proper fitment. Please contact us to confirm correct vehicle fitment and usage.

Availability: Item has been discontinued and is no longer available
Shipping: FREE 48 State Shipping


The L99 416 SS heart and soul is the new 4.065” aluminum block. The L99 designation has a Mast Motorsports engineered VVT camshaft that is custom ground on a Mast Motorsports VVT cam core. The 416 foundation is a honed and decked L99 aluminum block with a 4.000” forged Callies rotating assembly with Mahle pistons that is topped off with Mast CNC LS3/L92 heads and a LS3 intake manifold. ARP fasteners are used throughout and Manley pushrods ride on LS3 hydraulic roller lifters. The L99 416 is the second release of a diverse line of Mast Motorsports hand built Camaro L99 based Turnkey Crate Engines that are designed for the Hot Rod/Muscle Car market. The L99 416 peaks at the 600+ horsepower mark with a broad power curve and is competitively priced for such a powerful complete fuel injected turnkey crate engine.

Type: L99 6.8L
Displacement: 416 Cubic Inches
Compression Ratio: 11.2:1
Bore x Stroke: 4.070 x 4.000
Rev Limit: 7000 RPM
Crank: Callies Forged
Rods: Callies H-Beam
Pistons: Mahle Motorsports
Cam: Mast Custom VVT Core Cam
Heads: Mast CNC LS3/L92 Heads
Intake: LS3Car Intake
Valve Springs: Mast Nitrided Beehive

Application List



  • 117-122
  • 117-122
  • Mast Motorsports
  • Item has been discontinued and is no longer available
  • New


Shipping Information

  • Item Requires Shipping
  • 500.0 lbs.
  • FREE 48 State Shipping

Customer Reviews

Comment Total Reviews (0)

Write the First Review!

You must login to post a review.

Trusted Specialists GM engine & parts specialists
Located in the USA Owned, operated, & employed
Need Assistance? Call us at 888-748-4655
Mon-Thu 8am-6pm EST
Fri 8am-5:30pm EST
Have a Question Email us and we'll get back to you within 24 hours
Pace B2B