2500hp rated Dart LS Next2 ALUMINUM Dry Deck HYDRAULIC Roller Long Block


Our 2500hp rated Dart LS Next2 Aluminum Hydraulic Roller Long Block, for Forced Induction applications are fully machined, balanced & blueprinted, and come with deck and cylinder surface finish reports and an engine spec log. 

Our long blocks come ‘broken-in’ on our dyno using our shop intake and exhaust.

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.


Our 2500hp rated Dart LS Next2 Aluminum Hydraulic Roller Long Blocks are ideal for Drag Radial and all other Race cars.

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

  • Balancing
  • CNC Block Machining
  • Cylinders double torque plate diamond honed for correct piston to wall clearance and surface finish
  • Full surface finish report on deck, head and cylinder wall finish 
  • Engine fully blueprinted
  • Heads CC’d and valve job
  • Valve spring heights set up 
  • Pushrod length
  • Rocker geometry
  • Machining for RCD Gear Drive
  • Dyno Test
  • LAT 20W50SAE Break-in Oil
  • Dyno Data sheets


  • 2500hp rated Dart LS Next2 Aluminum- Solid casting – no water
  • Bore & stroke –TBD
  • Engine size – 388ci/408ci/427ci 
  • Piston Dish – TBD

Short Block Components:

  • Dart LS Next Aluminum 4.125″ bore
  • Callies Ultra Billet crankshaft
  • Clevite Coated Rod Bearings w/ dowel
  • Clevite LS Next Coated Main Bearings
  • MGP Billet aluminum 6.125″ rods 
  • Ross Racing Pistons
  • Total Seal Piston Rings AP Steel Ring Pack  – Optional upgrade to Total Seal Gas-ported Top Ring
    • NB – Gas Ported Piston Rings direct cylinder pressure to the back of the ring through machined horizontal slots placed around the ring. The pressure pushes against the inside of the ring forcing it outward into the cylinder wall to improve ring seal evenly around the cylinder.

Long Block Components:

  • CID LS7 Cylinder Heads – Solid casting – dry deck
  • Clarke Copper Cylinder Head Gaskets
  • Custom Camshaft
  • PAC Racing Springs
  • Custom Manton push rods
  • Johnson Link Bar Lifters 2126LSR 
  • ATI Super Damper
  • Mighty Mouse Timing Pointer
  • ACE Custom shaft mount LS7 Rockers
  • RCD Billet Gear Drive
  • Improved Racing Oil Pan Gasket
  • Dailey Engineering dry sump system
  • Rear timing cover & gasket
  • Billet valley cover
  • ACE Racing Engines Billet valve covers (black w/ -12AN breathers) 

Optional Upgrades:

  • Total Seal Piston Rings Gapless & Gas-ported Top Ring

Single or Twin Turbo. x58 reluctor wheel.

This 2500hp+ turbo LS aluminum long block is based on a twin or single turbo application tune professionally. Also available as a SOLID ROLLER long block, and as a short block. We recommend FuelTech EFI for this engine.  

Other LS Long Blocks, Short blocks and Complete Crate engines are also available. Go back to ALL Street & Racing Engines here.

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

We work closely with our suppliers to keep on top of, and be a part of new innovations in our industry. Click here for more information about Total Seal Gapless & Gas-ported Piston Rings.


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.


Additional information

Weight 300 lbs
Dimensions 42 × 40 × 26 in

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