HPR 6.2L LSA Forced Induction Long Block

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  • Regular price $14,495.95

HPR 6.2L LS Forced Induction Long Block 

This package as proven to make over 800 supercharged rwhp on premium pump gas!

HPR's forged LS3/LSA.  Starting with a fresh GM LS3 or the customer's LSA aluminum cylinder block as the foundation we fill the block with forged crankshaft, rods, and pistons all machined and assembled here in house.  The GM 8 bolt LSA forged crank has proven to hold reliable in our forced induction builds, including the Texas Mile CTSV record holder that we built. 

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 include (unless otherwise stated), all covers installed with full measured valvetrain ready for your intake, oil pan, and accessories to make the install as easy as possible. 

 **2020 GM has stopped production on the LSA - these prices assume you have a good core to start from**

*Package shown with LSA block, engine covers, and Jesel shaft mount rocker arms

**Dyno example using Jesel rockers, Magnuson 2300 supercharger, headers, installed in a CTSV by the customer measured at the rear tires

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 GM LS3 or customer supplied LSA aluminum block
  • ARP Main stud kit
  • Forged GM LSA 8 bolt crankshaft
  • Forged H beam Connecting rods
  • HPR spec pistons by Wiseco with upgraded S718 pins
  • HPR designed and spec piston ring pack by Wiseco
  • 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 with matching cam gear
  • MAST 255cc Black Label CNC ported cylinder heads
  • HPR custom ground cam to your specifications
  • Morel link bar lifters with larger 0.750" wheels
  • HPR custom chrome moly double taper pushrods
  • GM or Jesel shaft mount rockers (shown with Jesel's)
  • MLS head gaskets
  • ARP head studs
  • Melling 355 Hi press/Hi volume pump
  • C5R timing chain set
  • GM engine covers. (front, rear, valley) *optional
  • All engine block and head plugs


 Items required to finish:

  • Engine sensors (except for cam position, included with front cover)
  • Valve covers
  • supercharger
  • Harmonic balancer
  • Oil pan and pickup tube
  • Water pump
  • Accessories
  • Spark plugs


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