HPR Aluminum 468 LS Long Block - LS7 head

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  • Regular price $21,115.50

HorsePower Research

HPR 468 LS Long Block 

HPR Signature 468.  Starting with a fresh GM LS aluminum cylinder block as the foundation we then sleeve to accept a much larger bore size.  Once the block is sleeved we fill the it with forged crankshaft, rods, and pistons all machined and assembled here in house.  The larger stroke and bore of the 468 will greatly aid in torque production over a standard LS7's 4.00" stroke unit while allowing better utilization of higher flowing cylinder heads from West Coast Cylinder head LS7 heads and our custom ground cam

Every component is thoroughly measured, cleaned, and assembled for proper fit under the most extreme uses. 

 Long block is completely assembled, balanced and blue printed to exacting specifications set by Erik.  We do all of the valve train setup, cam degree, spring setup and install taking the guess work out on the customer end.  Bolt on your covers, intake, sensors and it is ready to go!  

We offer a number of proven camshafts that are gentle enough for road racing under the most demanding conditions while providing excellent power and reliability.  Speak to your sales rep for specs on your engine build!  

Looking for a custom build? We can do that too!  Ask your sales rep for details for more info today sales@horsepower-research.com



  • New sleeved GM LS aluminum block
  • ARP Main stud kit
  • Forged steel crankshaft by K1 Technologies
  • Forged connecting rods
  • HPR spec pistons
  • HPR designed and spec piston ring pack
  • All components Ultra Sonic washed before assembly
  • Machine work and assembly done in house at HPR
  • Your choice of 24x or 58x crankshaft reluctor wheels
  • Short or Long post crankshaft for normal oil pump or OE dry sump
  • HPR CNC ported BR7 cylinder heads with stainless exhaust.
  • HPR custom ground cam to your specifications
  • GM COPO lifters and trays
  • HPR custom chrome moly pushrods
  • New GM LS7 rocker arms with trunion update
  • MLS head gaskets
  • ARP head bolts
  • Melling 355 Hi press/Hi volume pump Std post or Katech Red Pump DS
  • C5R timing chain set
  • All engine block and head plugs


 Items required to finish:

  • Engine sensors
  • Engine covers (front, rear, valley)
  • Valve covers
  • Intake manifold
  • Harmonic balancer
  • Oil pan and pickup tube
  • Water pump
  • Accessories
  • Spark plugs

 **Engine shown with GM Covers, not included

***ALL ENGINES ARE BUILT TO ORDER - Please contact your sales rep for build time and ETA