Manley 4.050" Pro Series Stroker Rotating Assembly for Gen III Hemi 5.7L

Product Code: MAN5.7RB
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High Horse Performance is Veteran Owned & Operated
Manley Performance is proud to introduce our "PRO SERIES" stroker crankshaft designed for the small block HEMI engine. Manufactured from a premium 4340 steel forging, these cranks feature a 4.050" stroke which can turn your 5.7L into a 392 c.i. engine. The Manley 4.050" stroke HEMI crankshaft features small block Chevy small journal (2.000") crank pin diameters and widths. This provides taller "side walls" on the crankshaft rod journals for better oil control and reduced windage. The counterweights are profiled for 6.125" length connecting rods.

  • Lightweight 4340 material forging
  • Multi-step heat treatment process and Nitrided for added strength
  • Stress relieved, shot-peened, and 100% magnafluxed
  • Micro polished large .125" radius journals
  • Comes with 32 tooth reluctor wheel for Non-VVT HEMI engines or 58 tooth reluctor wheel for VVT HEMI engines.
  • Gun drilled mains and lightened rod journals for weight reduction
  • Counterweights fully profiled


  • Lightweight design 4340 material forgings
  • Fully machined, heat treated, stress relieved, shot peened, and 100% magnafluxed
  • Big and small end bores are final honed to a tolerance of ± .0002"
  • Bend and twist is tightly controlled
  • Weight matched to +/- 1.5 grams
  • H-Beam comes standard with 7/16" ARP 8740 bolts (ARP 2000 bolt upgrade available, contact HHP for more info)


  • High strength 2618 alloy forgings
  • Exacting ring groove squareness to cylinder wall provides maximum horsepower.
  • Offset wrist pin design
  • Moly coated skirts


  • 1.5 x 1.5 x 3mm Total Seal (moly in-lay tops standard)
  • Premium steel top rings are optional


  • Premium Clevite¨ "H" Series narrowed rod bearings and "P" Series main bearings


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  • 5
    New Car!

    Posted by Trevon Hall on Sep 19th 2022

    Smiles Per Gallon is the correct phrase for this new setup. This Stroker kit combined with long tubes, Catback, bigger TB, bigger injectors, and some ported parts makes this setup an absolute monster! I literally could not be happier! What’s the point of getting a Scat when they can’t keep up with you or a stock Hellcat when you can turn up the boost up to 12psi with this kit and see them in your rear view? My R/T is a complete joy to daily drive and I cannot thank HHP and Manley enough for their services. Going with a Vortech supercharger soon and see how well it pulls!