HPR Aluminum 442 LS3 Short Block

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  • Regular price $8,860.55

HPR 442 LS3 Short block


The HPR 442 is one of our own designs and features some exclusive components only found here.  Erik designed this package to extract the most displacement from a stock LS3 engine block without having to go through the expensive of sleeving the block.  The 442 features a 4.070" bore and a huge 4.250" stroke forged crankshaft.   

Starting with a new GM LS3 block HPR has designed this stroker kit to get the most displacement for your dollar.  Never again will you have to settle for the typical 402/414 build!  This means you have no physical size changes of any normal production LS engine so fitment in tight spaces like a late model Corvette requires no special headers or hood for install! 

Pistons used our of our own Erik Koenig's design and are manufactured by the best in the business, Wiseco pistons.  Ultra strong H beam connecting rods link them to a forged crankshaft secured by ARP studs.


  • New GM LS3 aluminum block
  • ARP Main stud kit
  • Forged steel crankshaft
  • 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

 The 442 package is perfect for those wanting maximum NA performance without breaking the bank on a costly sleeved block and exotic components.  FORCED INDUCTION POWER WITHOUT THE HASSLE! 



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