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1,400hp LSX Short-Block (Complete)

Short and Long-block Combinations

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1,400hp LSX Short-Block (Complete)


This STEVE MORRIS ENGINES 376-416CID LSX short-block is a great way for you to start your engine build with the right parts!  Unlike competitors, we include the correct combination of parts (not hide them as "extras" that you have to select) for best results.  Here is a little bit about what you will be getting.

Our LSX short-blocks start with a brand-new GMPP LSX block, machined and balanced in-house to our specifications.  We align-hone and final hone with our torque-plate to ensure proper ring seal and optimal performance.  The GMPP LSx block will offer maximum clamping force of the cylinder heads to the block when combined with any of the aftermarket 6-bolt cylinder heads, although you can run a 4-bolt head if the newer heads just don't fit your budget.

Our short-blocks feature DIAMOND RACING or CP BULLET-series forged 4.070" piston package.  These pistons are designed to accommodate LS1, LS2, LS6, L92, LS3, LS7, and most aftermarket cylinder heads and valve configuration. The  piston sets listed are 2618 forgings and feature lowered ring lands to accommodate boosted applications.  All pistons will use a 1.2mm/1.2mm/3.0mm ring pack with a gas-nitrited steel top ring and Napier second ring.
We use a quality 4340-forged H-beam design connecting rod with ARP2000 connecting rod bolts.  These are the same ones we have used in the LS-FREE engine build, as well as numerous other forced induction builds.
For a crankshaft, we use a forged 4340 crankshaft (you can choose from MOLNAR, EAGLE, SCAT, or MANLEY) that we will balance in-house to our specifications.  In our experience, they are capable pieces that can withstand up to approximately 1,400hp.

*Comprehensive Parts list below*

  • GM LSX Iron Block- Billet main caps
  • 4340 Forged Crankshaft (your choice EAGLE, MANLEY, MOLNAR, SCAT)
  • SME Forged 4340 H-Beam LS Connecting Rods - ARP 2000 Bolts
  • 2618-alloy Piston Kit- 4.070" bore, 6.125" rod (DIAMOND or CP-CARRILLO BULLET)
  • King Main Bearing
  • King Connecting Rod bearings
  • Crankshaft Balancing
  • Surface Engine Block
  • Plateau Hone Engine Block (V-8)
  • Clean, debur, and install rotating assembly
  • STEVE MORRIS ENGINES Custom Camshaft - for your application
  • ROLLMASTER LS Single Roller timing set - Heavy Duty IWIS Chain
  • Melling Billet Aluminum Oil Pump
  • Cam Thrust Plate for LS
  • Bolts for Cam Thrust Plate
  • LS Factory Lifter Guides and bolts
  • Front and rear covers, seals, bolts, and cam sensor

Custom builds are available.

We offer multiple brands of connecting rods and crankshafts to suit any type of application. Every engine will come standard with the necessary oil and coolant plugs already installed in the block.

All engines will ship via truck freight in a small enclosed crate, so if are purchasing online the shipping costs listed will NOT be correct!  We will contact you with a shipping cost after your order has been placed.  All prices listed do not include the applicable shipping costs!

The average build time will normally take three to four weeks once all parts are in our shop. This is only an estimate since circumstances and wait times will vary.  Please give us a call for an accurate, up-to-date time quote. 

Part #: 1265

Price: $10,495.00
Sale Price: $9,199.99
Add ARP main studs?:

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