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Arrington Forged 392 Crate Engine

Dimensions:42 x 42 x 48
Weight:600.0 lbs
Arrington Performance
Price: $13,499.00
The Arrington Forged 392 crate engine does not change the displacement of the stock 6.4L HEMI engine, but upgrades the components for higher-performance applications, including forced induction. The Chrysler 6.4L HEMI is notorious for failing when pushed by a supercharger or turbocharger at 8 psi boost or more. We replace all of the moving parts with forged or matched high-performance parts, ready to rev higher, work harder, and increase overall power. When paired with a controller, this engine is ready to drop in as the power plant for an updated classic car or hot rod. Or use as replacement or upgrade to your modern car or truck using the OEM control systems and our custom tune.

Other displacements are available based on the 6.4L block, including the Arrington 426, or expanding up to 448 cubic inches.

Note: NO CORES required -- call if you are upgrading and want credit for trading in your existing engine.


Arrington 392 Forged from Chrysler 6.4L Block

  • 392 Cubic Inch Displacement
  • Bore: 4.095
  • Stroke: 3.72 (stock size)
  • 500 Crank HP (rated)
  • Target Compression Ratio (low): 9.5 : 1
  • Target Compression Ratio (high): 11.0 : 1
  • 3 yr. / 36,000 mile warranty

Short block components:

  • Mopar – 4340 Forged Steel Crankshaft
  • Molnar Technologies – H Beam 4340 Forged Steel Connecting Rods with ARP 2000 Rod Bolts
  • Mahle -- Forged Aluminum Pistons (Arrington spec)
  • High Performance Piston Rings
  • ARP Main Studs
  • Billet Main Bearing Caps (optional)
  • Clevite H Type Main and Rod Bearings

Block inspection and prep:

  • Hot Tank Clean the Block (remove all liquid and contaminants from block & oil galleys)
  • Sonic Check Cylinder Bores
  • Measurement Verifications
  • Borescope Cavities (if required)
  • Validate Deck Surface
  • Validate Bore Centerlines
  • Hone Cylinders w/Honing Plate
  • Line Hone
  • Hand Chase Threads (if required)

Attention to detail:

  • Rotating Assembly
    • Balance Rotating Assembly (we do not depend on factory balance)
    • Micrometer Measurement Of All Bearing Surfaces
    • Hand Match Individual Bearings To Journals For Maximum Tolerances
    • Micro-polish All Bearing Surfaces (including wrist pins)
    • Hand Clearance for Stroker Kit
  • Block
    • Remove All Flashing (chamfer all 90° corners)
    • Radius Bottom Of All Cylinder Bores
    • Arrington-developed Oil System Prep
    • Other Proprietary Block Operations


  • ARP Head Studs (optional)
  • OEM Cylinder Heads
  • Arrington Custom-ported Heads With Valve Matching (optional)
  • Melling High Performance Oil Pump
  • Camshaft and Chromoly Pushrods (Arrington spec)
  • Cometic Head Gaskets
  • Mopar OEM non-MDS Lifters

Crate engine adds:

  • Mopar OEM Balancer (ATI available)
  • Cometic Intake and Exhaust Gaskets
  • OEM Dipstick, Oil Pan, Sensors, Valve Covers, Coil Packs (custom pan available)
  • OEM Intake Manifold and Exhaust Headers (short)
  • OEM Fuel Rails (Arrington Fuel Rails optional)
  • OEM Throttle Body (larger Arrington TBs available)
  • Fuel Injectors
  • NGK Spark Plugs
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