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$924.99
$909.99
Premium Small Block Chevy Rotating Assembly, 400 Flat Top, 6 Inch Rods
Premium Small Block Chevy Rotating Assembly, 400 Flat Top, 6 Inch Rods

Premium Small Block Chevy Rotating Assembly, 400 Flat Top, 6 Inch Rods

400 Chevy Small Block V8, 400 mains Main Journal Style, 3.750" Engine Stroke, Narrowed Bearing

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Premium Small Block Chevy Rotating Assembly, 400 Flat Top, 6 Inch Rods
Premium Small Block Chevy Rotating Assembly, 400 Flat Top, 6 Inch Rods
Premium Small Block Chevy Rotating Assembly, 400 Flat Top, 6 Inch Rods
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Premium Small Block Chevy Rotating Assembly, 400 Flat Top, 6 Inch Rods
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Part # 91510290
$909.99
$924.99
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  • For 400 small block Chevy V8's
  • Kit includes new 2-pc rear main seal cast steel crank, rods, pistons rod & main bearings
  • Cast steel crankshaft
  • Forged 4340 steel connecting rods
  • 6" rod length

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You're almost there! This kit has an option or two for you to select. Let us know which options you want for your new kit.
Item 1 of 1
KB Chevy 400 Hyperutectic Pistons, Flat Top, 6.0 Rod
KB Chevy 400 Hyperutectic Pistons, Flat Top, 6.0 Rod
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Details

Main Journal Style:
400 mains
Engine Stroke:
3.750"
Connecting Rod Type:
H-Beam
Connecting Rod Length:
6.000"
Connecting Rod Material:
Forged 4340 Steel
Connecting Rod Weight:
638 grams
Connecting Rod Bolt Diameter:
7/16"
Piston Style:
Flat Top
Piston Material:
Hypereutectic Aluminum
Piston Weight:
475 grams
Piston Ring Style:
C
Crankshaft Material:
Cast Steel
Rear Main Seal Style:
2-piece
Wrist Pin Diameter:
0.9272"
Wrist Pin Weight:
145 grams
Main Journal Diameter:
2.650"
Rod Journal Diameter:
2.10"
Bearing Construction:
Bi-metal
Bearing Undersize:
Standard
Narrowed Bearing:
Yes
Coated Bearing:
No
MFG. Part #:
91510290
Sold in Quantity:
Kit

Info

Speedway introduces premium rotating assembly engine rebuild kits, with an optional balance job. Includes new 2-pc rear main seal cast steel crank, rods, pistons rod & main bearings. Cranks are new so they use standard size bearings.

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.

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

Item Details

Flat top, 620 g

C/R 58cc=12.3, 64cc=11.64, 76cc=10.0
Piston/Pin Weight: 475 g
Rod Length: 6.0", Ring Style: C     

Notes

Kits include:

  • Speedway Cast Steel Crankshaft
    • Two-piece rear main
    • 80-60-06 cast steel construction
    • Fatigue-resistant with near forged steel endurance
    • Standard size journals
  • Speedway 4340 H-beam Connecting Rods w/ ARP bolts
    • Full floating pin in silicon bronze bushing
    • Precision bolt bushings to positively locate cap
    • 6" lengths
    • 634 grams
    • Weight matched set of 8 rods
  • Keith Black Signature Series Hypereutectic Pistons
    • T-5 heat treated aluminum construction
    • Super stiff design for maximum ring seal
    • 4.000" bore pistons available in .030, .040, or .060 sizes
    • 4.125" bore pistons available in .030 or .040 sizes
  • King HP Series Main & Rod Bearings
    • 0.015" thick top layer for superior macro particle embedability and conformability
    • 40 Vickers hardness to resist overlay migration and extrusion
    • 450°F heat threshold for superior protection against friction and overheating
    • Mains are 3/4 grooved for improved oiling to the rod journals
    • Bi-metal aluminum silicon alloy featuring fine micro-bore finish

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.
  • Scat 940050 400 Chevy Cast Steel Crankshaft
    Qty x 1
  • Small Block Chevy 6.0 H-Beam Connecting Rods, 4340 Steel, 7/16
    Qty x 1
  • KB Chevy 400 Hyperutectic Pistons, Flat Top, 6.0 Rod
    Qty x 1
  • King HP Series Chevy 350/400 Large Journal Engine Rod Bearings, Std
    Qty x 1
  • King MB 509HP HP Series Chevy 400 Large Journal Main Bearings
    Qty x 1

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