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Forged Street SB Chevy 383 Rotating Assembly, 6 In I-Beam Rods
Forged Street SB Chevy 383 Rotating Assembly, 6 In I-Beam Rods

Forged Street SB Chevy 383 Rotating Assembly, 6 In I-Beam Rods

350 Chevy Small Block V8, 383 Chevy Small Block V8, 350 mains Main Journal Style

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Forged Street SB Chevy 383 Rotating Assembly, 6 In I-Beam Rods
Forged Street SB Chevy 383 Rotating Assembly, 6 In I-Beam Rods
Forged Street SB Chevy 383 Rotating Assembly, 6 In I-Beam Rods
Forged Street SB Chevy 383 Rotating Assembly, 6 In I-Beam Rods
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Part # 9151234
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What's In The Kit
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  • Specifically designed for the 383 Small Block Chevy's
  • Crankshaft is made from 4340 Forged steel that is nitride hardened and shot peened
  • Rods are stroker clearance and come with ARP 7/16" cap screw bolts
  • Pistons are manufactured from lightweight 2618 aluminum alloy
  • All Scat 4340 crankshafts are 2-piece rear main seal, internally balanced and weigh approximately 51-55 lbs.

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Icon Chevy 383 Forged Pistons, Dish, 6.0 Inch Rod
Icon Chevy 383 Forged Pistons, Dish, 6.0 Inch Rod
Quantity: 1
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Main Journal Style:
350 mains
Engine Stroke:
Connecting Rod Type:
Connecting Rod Length:
Connecting Rod Material:
Forged 4340 Steel
Connecting Rod Weight:
605 grams
Connecting Rod Bolt Diameter:
Piston Style:
Piston Material:
Forged Aluminum
Piston Weight:
422 grams
Piston Ring Style:
Crankshaft Material:
Forged 4340 Steel
Rear Main Seal Style:
Wrist Pin Diameter:
Wrist Pin Weight:
132 grams
Main Journal Diameter:
Rod Journal Diameter:
Bearing Construction:
Bearing Undersize:
Narrowed Bearing:
Coated Bearing:
MFG. Part #:
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.

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

Item Details

Features internally balanced 383 crankshaft - use balance option # 915-10200


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
    • 6.0" rod: 629 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

Important Messages

  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
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 383 Forged Pistons, Dish, 6.0 Inch Rod
    Qty x 1
  • Scat 26000716 Small Block Chevy 4340 I-Beam Rods, 6.0 Inch, Bushed Pin
    Qty x 1
  • Scat 4-350-3750-5700 383 Chevy 4340 Forged Crankshaft, 3.75 Stroke
    Qty x 1
  • King HP Series Chevy 350/400 Large Journal Engine Rod Bearings, Std
    Qty x 1
  • King MB 557HP HP Series Chevy 350 Large Journal Main Bearings
    Qty x 1

More Like This


Q & A

Videos & Articles
  • Learn about the importance of getting the chain tension set correctly, and why it is critical that we get it as near perfect as we can. Walkthrough a basic procedure that effectively and consistently gets the chain tension set properly every time.
  • Step back in time with our modern reproduction of the iconic Chevy 461 double hump cylinder heads, now cast in lightweight aluminum! In this video, Joe and Wyatt discuss the features that bring the vaunted camel hump heads into the 21st Century.
  • In this Tech Tip, John discusses LT1 rotating assembly options for a customer looking to build a solid autoX, drag, and occasional strip powerplant for his Firebird.
  • Check out this helpful piston ring style chart.

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