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Forged Street Small Block Chevy 377 Rotating Assembly, 5.7 Inch Rods
Forged Street Small Block Chevy 377 Rotating Assembly, 5.7 Inch Rods

Forged Street Small Block Chevy 377 Rotating Assembly, 5.7 Inch Rods

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Forged Street Small Block Chevy 377 Rotating Assembly, 5.7 Inch Rods
Forged Street Small Block Chevy 377 Rotating Assembly, 5.7 Inch Rods
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Part # 9151226
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Icon Chevy 377 Forged Pistons, Dish, 5.7 Rod
Icon Chevy 377 Forged Pistons, Dish, 5.7 Rod
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Piston Material:
Forged Aluminum
Connecting Rod Type:
Connecting Rod Length:
Crankshaft Material:
Forged 4340 Steel
Rear Main Seal Style:
Main Journal Style:
400 mains
Piston Style:
Piston Ring Style:
Piston Weight:
541 grams
Wrist Pin Weight:
132 grams
Wrist Pin Diameter:
Connecting Rod Material:
Forged 4340 Steel
Connecting Rod Weight:
590 grams
Connecting Rod Bolt Diameter:
Main Journal Diameter:
Rod Journal Diameter:
Bearing Construction:
Bearing Undersize:
Narrowed Bearing:
Coated Bearing:
Sold in Quantity:


These rotating assembly engine rebuild kits are designed for street use and include Keith Black forged pistons, Scat 4340 Pro-Comp I-beam rods and a Scat 4340 forged crankshaft.

All Scat 4340 cranks are 2-piece rear main seal, internally balanced and weigh approximately 51-55 lbs.

These assemblies will require balancing either by us or your machine shop.  All kits can be internally balanced.

All balancing is done with our state-of-the-art Hines balancer by race mechanics with over 30 years of experience!  A kit purchased with the optional balance job will ship in 24-48 hours. 

Rings and bearings not included. Journals are standard size. Due to larger journal side radius on this aftermarket crankshaft, you must use Clevite H-series, King bearings or equivalent.  Includes spacers for main bearings.

NOTE: Piston rings are not included and must be purchased separately.

Item Details

Includes spacers for main bearings


Kit includes:

  • Scat 4340 Forged Steel Crankshaft
    • Straight shot and chamfered oil holes
    • Nitride hardened and shot peened
    • Lightening holes in all rod throws
    • Large radius on all journals
  • Scat Pro Comp 4340 I-Beam Rods
    • Stroker clearanced
    • ARP 7/16" cap screw bolts
    • Bushed pin
    • 5.7" rod: 628 grams
    • Crank pin: 2.100"
    • Wrist pin: .927"
    • B.E. width: .940"
    • Set of 8 rods
  • KB Signature Series Forged Pistons
    • Dished
    • 2618 aluminum alloy construction
    • T-6 heat treated 
    • 4.000" bore pistons available in standard, .030, .040, or .060 sizes
    • 4.125" bore pistons available in standard, .030 or .040 sizes


Some parts are not legal for use in California or other states with similar laws/regulations

Related Products

What's In The Kit

Each kit from Speedway Motors is carefully packaged and delivered right to your door. Below is a list of all the items you should expect to receive when you order this kit. Some of these items may also be available for sale individually if you're here looking for replacement parts.
  • Icon Chevy 377 Forged Pistons, Dish, 5.7 Rod
    Qty x 1
  • Scat 25700716 Small Block Chevy 4340 I-Beam Rods, 5.7 Inch, Bushed Pin
    Qty x 1
  • Scat 435010 Chevy 350 Crankshaft, 4340 Forged, 3.48 Stroke, 350 Main
    Qty x 1
  • Main Bearing Spacers - Small Block Chevy, 350 Crank
    Qty x 1
  • King HP Series Chevy 350/400 Large Journal Engine Rod Bearings, Std
    Qty x 1
  • King HP Series Chevy 400 Large Journal Engine Main Bearings, Standard
    Qty x 1

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