HPR Forged 416 LS3 Short Block

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  • Regular price $8,735.50

HPR 416 LS3 Short block


Starting with GM's potent LS3 engine block, we have designed this short block with larger displacement for those running boost or going NA depending on compression.  ARP main studs are installed before checking main bearing housing sizes, then correctly machined.  Piston bores are torque plate honed to size and to our exacting finish standards.  Forged 8cw Callies Compstar crankshafts are available in either std post or LS7 style.  Forged H beam connecting rods with ARP rod bolts standard.  Forged 2618 alloy pistons in your choice of flat top or dished depending on application. 


  • New GM LS3 aluminum block or customer supplied LSA
  • ARP Main stud kit
  • Callies Compstar 8cw forged crankshaft
  • Forged connecting rods by K1 Technologies
  • Forged connecting rods
  • HPR Spec 2618 forged piston set
  • All components Ultra Sonic washed before assembly
  • Machine work and assembly done in house at HPR
  • Your choice of Billet 24x or OE 58x crankshaft reluctor wheels
  • Std or LS7 post crankshafts



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