2500hp rated Dart LS Next2 IRON HYDRAULIC Roller Long Block


Price may vary. Please contact us to discuss your engine application and obtain a custom quote.

+1 (424) 378-1219

We like to get to know our customers, their cars and what kind of engine/power they are looking for. Please contact us prior to ordering, to dial in the spec to meet your engine requirements.


Set up includes, but not limited to the following precision machining/blueprinting:

  • Balancing
  • CNC Deck Block
  • Cylinders double torque plate CNC diamond honed for correct piston to wall clearance and surface finish.
  • Align Hone
  • CNC Machine Block for Receiver Grooves
  • CNC Machine Cylinder Heads for Top Fuel hoops
  • Full surface finish reports on deck and cylinder wall finish
    • According to fuel and power adder
  • Heads CC’d and valve job
  • Valve spring heights set up 
  • Pushrod length
  • Rocker geometry
  • Dyno Break-In
  • Dyno Test 
  • Engine fully blueprinted
  • Engine Build File & Dyno Data sheets provided

Short Block Components:

  • Dart LS Next2 Iron Block 4.000″ or 4.125″ bore, 9.240″ Deck height
    • 1/2″ Main Studs
    • 1/2″ Heads Studs
    • LS 2.560″ Mains
  • Callies Ultra Billet or Winberg Crankshaft
  • Clevite LS Next Rod Bearings
  • Clevite LS Next Coated Main Bearings
  • MGP Billet Aluminum Rods
  • Custom Ross Racing Pistons
  • Total Seal Piston Rings AP Steel Ring Pack 

Long Block Components:

  • CID Cylinder Heads
  • BAE One-Piece Stainless Steel O-rings
  • Clark Copper Cylinder Head Gaskets
  • Custom Camshaft
  • BTR Spring Kit w/ Ti retainers
  • Custom Manton push rods
  • Crower Shaft Rockers
  • Johnson Link Bar Lifters
  • ATI Super Damper w/ Fuel Pump Hub
  • Mighty Mouse Timing Pointer
  • RCD Gear Drive
  • ARP Hardware
  • Peterson External Wet Oil Pump system or Dailey Engineering dry sump system  (We highly recommend using Dry Sump for this engine)
  • Rear timing cover & gasket
  • Billet valley cover
  • ACE Racing Engines Billet valve covers (black or raw)


We recommend FuelTech EFI for this engine.  

This quote is non-exhaustive, please contact us for a personalized quote for your desired power-adder.


ACE Racing Engines makes no guarantee regarding operation of the Goods in settings or in ways that may be illegal or highly regulated, including those regarding smog and emissions. Please refer to your State/Country guidelines. 

The product images shown are for illustration purposes only and may not be an exact representation of the product.