408ci 6.0L LQ9 Short Block "The Sledgehammer"

Texas Speed

(No reviews yet) Write a Review
$6,219.99 - $6,509.94
Adding to cart… The item has been added

Product Overview

Note: Heavy freight charge of $469.99 is already added to this block's cost as shown. This includes the crate and egine cradel required for shipping.

Gen IV LS-Series - In-Stock Short-Block Campaign: 

Introducing the all-new Sledgehammer 408! This is the latest release from our Brawler Series. This
heavy-duty iron block is ready to dish out the damage on the street or on the track. It has the cubes to
provide great naturally aspirated power, but also the strength needed for extensive boost.
The goal of our In-Stock Short Block project is to provide customers with high quality engine choices that
are ready to ship out in a few days. The same parts, machining, care and workmanship go into these
builds as our custom engine program. All engines are balanced, blueprinted and assembled in house, to
exacting TSP tolerances.

Sledgehammer build specifications:

  • 408ci / 6.6L Gen IV
  • GM Gen IV Iron 6.0L LQ9 Block
  • ARP Main Stud Kit
  • TSP 4.000” Forged Crankshaft – 58x Reluctor – 6-Bolt
  • TSP/Wiseco -3cc Flat Top or -11cc Dished Forged 4.030” Pistons – Boost or N/A – With Valve Reliefs
  • TSP 6.125” H-Beam Connecting Rods with ARP L19 Rod Bolts
  • 1000 HP Capable


  • Every short block comes equipped with a 58x crank reluctor wheel. If using in a 24x equipped Gen 3 Vehicle. You will need a Lingenfelter Crank Sensor Conversion Box located in the drop down box above. Part no. # L460065397



(No reviews yet) Write a Review