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Factory Mast Engine Block Super Lightened L8T- LTX Block Super Lightened LT Cast Iron LTX  - Gen V Cast Iron  - L8T - 6.6 Truck Block
Factory Mast Engine Block Super Lightened L8T- LTX Block Super Lightened LT Cast Iron LTX  - Gen V Cast Iron  - L8T - 6.6 Truck Block
Factory Mast Engine Block Super Lightened L8T- LTX Block Super Lightened LT Cast Iron LTX  - Gen V Cast Iron  - L8T - 6.6 Truck Block
Factory Mast Engine Block Super Lightened L8T- LTX Block Super Lightened LT Cast Iron LTX  - Gen V Cast Iron  - L8T - 6.6 Truck Block
Factory Mast Engine Block Super Lightened L8T- LTX Block Super Lightened LT Cast Iron LTX  - Gen V Cast Iron  - L8T - 6.6 Truck Block
Factory Mast Engine Block Super Lightened L8T- LTX Block Super Lightened LT Cast Iron LTX  - Gen V Cast Iron  - L8T - 6.6 Truck Block
Factory Mast Engine Block Super Lightened L8T- LTX Block Super Lightened LT Cast Iron LTX  - Gen V Cast Iron  - L8T - 6.6 Truck Block
Factory Mast Engine Block Super Lightened L8T- LTX Block Super Lightened LT Cast Iron LTX  - Gen V Cast Iron  - L8T - 6.6 Truck Block
Factory Mast Engine Block Super Lightened L8T- LTX Block Super Lightened LT Cast Iron LTX  - Gen V Cast Iron  - L8T - 6.6 Truck Block
Factory Mast Engine Block Super Lightened L8T- LTX Block Super Lightened LT Cast Iron LTX  - Gen V Cast Iron  - L8T - 6.6 Truck Block
Factory Mast Engine Block Super Lightened L8T- LTX Block Super Lightened LT Cast Iron LTX  - Gen V Cast Iron  - L8T - 6.6 Truck Block
Factory Mast Engine Block Super Lightened L8T- LTX Block Super Lightened LT Cast Iron LTX  - Gen V Cast Iron  - L8T - 6.6 Truck Block
Factory Mast Engine Block Super Lightened L8T- LTX Block Super Lightened LT Cast Iron LTX  - Gen V Cast Iron  - L8T - 6.6 Truck Block
Factory Mast Engine Block Super Lightened L8T- LTX Block Super Lightened LT Cast Iron LTX  - Gen V Cast Iron  - L8T - 6.6 Truck Block
Factory Mast Engine Block Super Lightened L8T- LTX Block Super Lightened LT Cast Iron LTX  - Gen V Cast Iron  - L8T - 6.6 Truck Block
$ 4,200.00

Super Lightened LT Cast Iron LTX - Gen V Cast Iron - L8T - 6.6 Truck Block

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Only left in stock

Race Spec L8T- GM Gen V Cast Iron - Super Lightened Block

We take the awesome new L8T and perform a multi axis CNC lightening program to reduce this hefty boy down by 30 lbs over the Factory L8T-  

Mast Motorsports product line ensures only the most premium components and rigorous inspection process, combined with proven Mast quality, and experience.

The GM Cast Iron Gen V (LT Series) block promises to deliver on big power potential when paired with the right Mast Motorsports or Factory Mast components.

Capable of 4.125" (+) stroke, 4.125" (+) bore size.

 

Specs:

  • Material - Cast Iron
  • Comes Line Honed with High Tensile Main Studs
  • Stock Bore Size - 4.065
  • Deck Height - 9.230
  • STARTING Weight - 245 lbs
  • LIGHTENED by 30 lbs Weight - FINAL WEIGHT 215 lbs!

****Final Weight May Vary Due To Casting inconsistencies***


     OPTIONS:

    1. Mast Provided Block w/ lightening & High Tensile main Studs, Blue printed & decked
    2. Customer Provided Block w/lightening & High Tensile main Studs, Blue printed & decked
    3. Customer Provided Block - Lightening Machine Work Only