427ci Factory Mast LS Crate Engine | 615 hp

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  • Regular price $14,850.00
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Factory Mast Engines Deliver Turn Key Crate Engine quality.

Factory Mast hand builds each engine, and remanufactures components to bring you only the highest quality turn key engine available.

Factory Mast LS engines come standard with CNC ported OE Castings, or upgrade to Mast Motorsports Black Label Heads.

EVERY Engine is dyno tested, and pre-programmed with a baseline dyno tune*, to get you on the road faster.  Backed by the Mast Limited Warranty.


  • 427 Cubic Inch
  • Ready to Run - Wire & Drive
  • HP Rated at 600+ HP
  • LS3 Style Port Heads
  • Holley ECM & Wiring Harness
  • Mast Billet Drive by Cable Throttle Body
  • Comes with Starter, water pump
  • All Engine Controls, wiring harness

* We recommend final tune be done in your vehicle for ultimate drive-ability.