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Speedway Motors Bill Smith


Lightweight Forged Small Block Chevy Rotating Assembly
 
 
 
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Starting at $149.99

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Our lightweight forged rotating assemblies include a 44-45 lb. Scat Superlight 4340 forged 2-pc rear main seal crankshaft, Scat 4340 forged I-beam connecting rods and Mahle pistons complete with wrist pins, locks and rings. Rod and main bearings not included. Standard size journals.

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.

These assemblies may require additional charges for heavy metal.


Kit includes:

  • Scat 4340 Lightweight Forged Steel Crankshaft
    • Profiled aero-wing counterweights
    • Pendulum cut to reduce rotating mass 
    • 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
    • Set of 8 rods
  • Mahle PowerPak Forged Pistons 
    • Lightweight slipper skirt design
    • Phosphate coated
    • Grafel anti-friction skirt coating
    • 4.000" bore pistons available in standard, .030, .040, or .060 sizes
    • 4.125" bore pistons available in standard, .030 or .040 sizes
    • Set of 8 pistons
    • Includes low drag rings, lightweight wrist pins and round wire locks 
  • Scat Pro Comp 4340 I-Beam Rods
    • 5.7" rod: 628 grams
    • 6.0" rod: 629 grams
    • Crank pin: 2.100"
    • Wrist pin: .927"
    • B.E. width: .940"
    Reviews for Item #: 91510200
    Price: $149.99 - $2,095.99
    Labor To Side Clearance Rods and Balance Rotating Assembly - 380/377 Kits
    Item #: 91510200
    Kit Price:    $149.99
    Item Details:
    350/377 kit
    Please allow 24-48 hrs for a kit to ship w/ this labor option.
    Selection of individual components may be necessary for kit purchase.
    IN STOCK
    Kit Components
    Labor-Balance Rotating Assy
    Item #:
    91600016
    Quantity: 1
    Side Clearance 8 Rods
    Item #:
    91600017
    Quantity: 1
    Select Kit QTY:
    Labor To Side Clearance Rods and Balance Rotating Assembly - 383/400 Kits (W/ Balance Plt & 8" Damp)
    Item #: 91510201
    Kit Price:    $219.99
    Item Details:
    383/400 kit (includes balance plate and 8" damper)
    Please allow 24-48 hrs for a kit to ship w/ this labor option.
    Selection of individual components may be necessary for kit purchase.
    IN STOCK
    Kit Components
    Harmonic Balancer - 400 8" Diameter - SBC
    Item #:
    91015400
    Quantity: 1
    Labor-Balance Rotating Assy
    Item #:
    91600016
    Quantity: 1
    Side Clearance 8 Rods
    Item #:
    91600017
    Quantity: 1
    1955-85 S/B Chevy Balancing Plate for 2 Piece Rear Main Seal Design
    Item #:
    91615375
    Quantity: 1
    Select Kit QTY:
    Light Rotating Assembly - 350 Inverted Dome, 5.7" Rods
    Item #: 9153000
    Kit Price:    $1,995.99
    Item Details:
    Inverted dome, 483 g
    Comp. 64cc: 9.0
    Ring Style: E
    Selection of individual components may be necessary for kit purchase.
    IN STOCK
    Kit Components
    CHEVY 350 INVERTED DOME POWERPAK PISTONS
    Item #:
    50355020
    Item Details:
    C/R 58cc=9.5, 64cc=9.0, 70cc=8.4
    Piston Weight: 483 g
    Rod Length: 5.7"
    Make product selection below:
    Quantity:
    Scat Pro Comp 4340 Forged Bushed I-Beam Connecting Rods, 5.7"
    Item #:
    91015230
    Item Details:
    593 Grams rod weight
    64 ft/lbs rod bolt torque
    Quantity: 1
    3.50" Stroke - 350 Mains - 2.10" Rods, 5.7" Long Rods
    Item #:
    91515225
    Quantity: 1
    Select Kit QTY:
    Light Rotating Assembly - 350 Flat Top, 5.7" Rods
    Item #: 9153005
    Kit Price:    $1,949.99
    Item Details:
    Flat top, 464 g
    Comp. 64cc: 10.6
    Ring Style: E
    Selection of individual components may be necessary for kit purchase.
    IN STOCK
    Kit Components
    CHEVY 350 FLATTOP POWERPAK PISTONS
    Item #:
    50355005
    Item Details:
    C/R 58cc=11.3, 64cc=10.6, 70cc=9.8
    Piston Weight: 464 g
    Rod Length: 5.7"
    Make product selection below:
    Quantity:
    Scat Pro Comp 4340 Forged Bushed I-Beam Connecting Rods, 5.7"
    Item #:
    91015230
    Item Details:
    593 Grams rod weight
    64 ft/lbs rod bolt torque
    Quantity: 1
    3.50" Stroke - 350 Mains - 2.10" Rods, 5.7" Long Rods
    Item #:
    91515225
    Quantity: 1
    Select Kit QTY:
    Light Rotating Assembly - 350 Flat Top, 6.0" Rods
    Item #: 9153010
    Kit Price:    $1,949.99
    Item Details:
    Flat top, 429 g
    Comp. 64cc: 10.6
    Ring Style: E
    Selection of individual components may be necessary for kit purchase.
    IN STOCK
    Kit Components
    CHEVY 350 FLATTOP POWERPAK PISTONS
    Item #:
    50325005
    Item Details:
    C/R 58cc=11.3, 64cc=10.6, 70cc=9.8
    Piston Weight: 429 g
    Rod Length: 6"
    Make product selection below:
    Quantity:
    Scat Pro Comp 4340 Forged Bushed I-Beam Connecting Rods, 6.0"
    Item #:
    91015232
    Item Details:
    585 Grams rod weight
    64 ft/lbs rod bolt torque
    Quantity: 1
    3.50" Stroke - 350 Mains - 2.10" Rods, 5.7" Long Rods
    Item #:
    91515225
    Quantity: 1
    Select Kit QTY:
    Light Rotating Assembly - 350 Dome, 5.7" Rods
    Item #: 9153015
    Kit Price:    $1,995.99
    Item Details:
    Dome, 501 g
    Comp. 64cc: 13.0
    Ring Style: E
    Selection of individual components may be necessary for kit purchase.
    IN STOCK
    Kit Components
    CHEVY 350 DOME POWERPAK PISTONS
    Item #:
    50355011
    Item Details:
    C/R 58cc=14.2, 64cc=13.0, 70cc=12.0
    Piston Weight: 501 g
    Rod Length: 5.7"
    Make product selection below:
    Quantity:
    Scat Pro Comp 4340 Forged Bushed I-Beam Connecting Rods, 5.7"
    Item #:
    91015230
    Item Details:
    593 Grams rod weight
    64 ft/lbs rod bolt torque
    Quantity: 1
    3.50" Stroke - 350 Mains - 2.10" Rods, 5.7" Long Rods
    Item #:
    91515225
    Quantity: 1
    Select Kit QTY:
    Light Rotating Assembly - 350 Dome, 6.0" Rods
    Item #: 9153020
    Kit Price:    $1,995.99
    Item Details:
    Dome, 465 g
    Comp. 64cc: 13.0
    Ring Style: E
    Selection of individual components may be necessary for kit purchase.
    IN STOCK
    Kit Components
    CHEVY 350 DOME POWERPAK PISTONS
    Item #:
    50325011
    Item Details:
    C/R 58cc=14.2, 64cc=13.0, 70cc=11.9
    Piston Weight: 465 g
    Rod Length: 6"
    Make product selection below:
    Quantity:
    Scat Pro Comp 4340 Forged Bushed I-Beam Connecting Rods, 6.0"
    Item #:
    91015232
    Item Details:
    585 Grams rod weight
    64 ft/lbs rod bolt torque
    Quantity: 1
    3.50" Stroke - 350 Mains - 2.10" Rods, 5.7" Long Rods
    Item #:
    91515225
    Quantity: 1
    Select Kit QTY:
    Light Rotating Assembly - 377 Flat Top, 5.7" Rods
    Item #: 9153025
    Kit Price:    $1,995.99
    Item Details:
    Flat top, 496 g
    Comp. 64cc: 11.0
    Ring Style: E
    Includes Spacer Bearings
    Selection of individual components may be necessary for kit purchase.
    IN STOCK
    Kit Components
    CHEVY 377 FLATTOP POWERPAK PISTONS
    Item #:
    50355105
    Item Details:
    C/R 58cc=11.8, 64cc=11.0, 70cc=10.3
    Piston Weight: 496 g
    Rod Length: 5.7"
    Make product selection below:
    Quantity:
    Main Bearing Spacers For S/B Chevy 350 Crank
    Item #:
    5051120
    Quantity: 1
    Scat Pro Comp 4340 Forged Bushed I-Beam Connecting Rods, 5.7"
    Item #:
    91015230
    Item Details:
    593 Grams rod weight
    64 ft/lbs rod bolt torque
    Quantity: 1
    3.50" Stroke - 350 Mains - 2.10" Rods, 5.7" Long Rods
    Item #:
    91515225
    Quantity: 1
    Select Kit QTY:
    Light Rotating Assembly - 383 Inverted Dome, 5.7" Rods
    Item #: 9153030
    Kit Price:    $2,095.99
    Item Details:
    Inverted dome, 452 g
    Comp. 64cc: 9.0
    Ring Style: E
    Selection of individual components may be necessary for kit purchase.
    IN STOCK
    Kit Components
    CHEVY 383 INVERTED DOME POWERPAK PISTONS
    Item #:
    50342526
    Item Details:
    C/R 58=9.5, 64cc=9.0, 70cc=8.5
    Piston Weight: 452 g
    Rod Length: 5.7"
    Make product selection below:
    Quantity:
    Scat Pro Comp 4340 Forged Bushed I-Beam Connecting Rods, 5.7"
    Item #:
    91015230
    Item Details:
    593 Grams rod weight
    64 ft/lbs rod bolt torque
    Quantity: 1
    3.75" Stroke - 350 Mains - 2.1" Rods, 6.0" Long Rods
    Item #:
    91515235
    Quantity: 1
    Select Kit QTY:
    Light Rotating Assembly - 383 Flat Top, 5.7" Rods
    Item #: 9153035
    Kit Price:    $2,049.99
    Item Details:
    Flat top, 464 g
    Comp. 64cc: 11.3
    Ring Style: E
    Selection of individual components may be necessary for kit purchase.
    IN STOCK
    Kit Components
    CHEVY 383 FLATTOP POWERPAK PISTONS
    Item #:
    50342505
    Item Details:
    C/R 58cc=12.0, 64cc=11.3, 70cc=10.4
    Piston Weight: 451 g
    Rod Length: 5.7"
    Make product selection below:
    Quantity:
    Scat Pro Comp 4340 Forged Bushed I-Beam Connecting Rods, 5.7"
    Item #:
    91015230
    Item Details:
    593 Grams rod weight
    64 ft/lbs rod bolt torque
    Quantity: 1
    3.75" Stroke - 350 Mains - 2.1" Rods, 6.0" Long Rods
    Item #:
    91515235
    Quantity: 1
    Select Kit QTY:
    Light Rotating Assembly - 383 Flat Top, 6.0" Rods
    Item #: 9153040
    Kit Price:    $2,049.99
    Item Details:
    Flat top, 406 g
    Comp. 64cc: 11.3
    Ring Style: E
    Selection of individual components may be necessary for kit purchase.
    IN STOCK
    Kit Components
    CHEVY 383 FLATTOP POWERPAK PISTONS
    Item #:
    50312505
    Item Details:
    C/R 64cc=11.3
    Piston Weight: 406 g
    Rod Length: 6"
    Make product selection below:
    Quantity:
    Scat Pro Comp 4340 Forged Bushed I-Beam Connecting Rods, 6.0"
    Item #:
    91015232
    Item Details:
    585 Grams rod weight
    64 ft/lbs rod bolt torque
    Quantity: 1
    3.75" Stroke - 350 Mains - 2.1" Rods, 6.0" Long Rods
    Item #:
    91515235
    Quantity: 1
    Select Kit QTY:
    Light Rotating Assembly - 383 Dome, 5.7" Rods
    Item #: 9153045
    Kit Price:    $2,095.99
    Item Details:
    Dome, 484 g
    Comp. 64cc: 13.8
    Ring Style: E
    Selection of individual components may be necessary for kit purchase.
    IN STOCK
    Kit Components
    CHEVY 383 DOME POWERPAK PISTONS
    Item #:
    50342511
    Item Details:
    C/R 58cc=15.2, 64cc=13.8, 70cc=12.6
    Piston Weight: 484 g
    Rod Length: 5.7"
    Make product selection below:
    Quantity:
    Scat Pro Comp 4340 Forged Bushed I-Beam Connecting Rods, 5.7"
    Item #:
    91015230
    Item Details:
    593 Grams rod weight
    64 ft/lbs rod bolt torque
    Quantity: 1
    3.75" Stroke - 350 Mains - 2.1" Rods, 6.0" Long Rods
    Item #:
    91515235
    Quantity: 1
    Select Kit QTY:
    Light Rotating Assembly - 383 Dome, 6.0" Rods
    Item #: 9153050
    Kit Price:    $2,095.99
    Item Details:
    Dome, 444 g
    Comp. 64cc: 13.8
    Ring Style: E
    Selection of individual components may be necessary for kit purchase.
    IN STOCK
    Kit Components
    CHEVY 383 DOME POWERPAK PISTONS
    Item #:
    50312511
    Item Details:
    C/R 58cc=15.2, 64cc=13.8, 70cc=12.6
    Piston Weight: 444 g
    Rod Length: 6"
    Make product selection below:
    Quantity:
    Scat Pro Comp 4340 Forged Bushed I-Beam Connecting Rods, 6.0"
    Item #:
    91015232
    Item Details:
    585 Grams rod weight
    64 ft/lbs rod bolt torque
    Quantity: 1
    3.75" Stroke - 350 Mains - 2.1" Rods, 6.0" Long Rods
    Item #:
    91515235
    Quantity: 1
    Select Kit QTY:
    Forged Rotating Assembly - 434 Flat Top / 6.0" Rods / 350 Main Journal
    Item #:
    9153060
    Item Details:
    Flat top, 420 g
    Comp. 64cc: 12.3
    Ring Style: E
    4.125" bore x 4" stroke
    Select Item Options to See
    Pricing and Availability:

    Forged Rotating Assembly - 434 Dome / 6.0" Rods / 350 Main Journal
    Item #:
    9153065
    Item Details:
    Dome, 435 g
    Comp. 64cc: 13.7
    Ring Style: E
    4.125" bore x 4" stroke
    Select Item Options to See
    Pricing and Availability:

    Our Techs also Suggest the Following:
    Labor To Side Clearance Rods and Balance Rotating Assembly - 380/377 Kits
    Item #:
    Price:
    KT
    $149.99
    Item Details:
    350/377 kit
    Please allow 24-48 hrs for a kit to ship w/ this labor option.

    IN STOCK
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