Street. Track. Everything between.
Your garage Find parts for your vehicle Select year, make and model to narrow your search.

Chevrolet Performance

Chevrolet Performance Harmonic Balancer Bolts 12557840 Bolt, Gen. 3 and 4 LS engines only. Steel, Cadmium, Hex Head, Chevy, 4.8, 5.3, 5.7, 6.0, 6.2L Each

SKU: NAL12557840

Harmonic Balancer Bolts
Chevrolet Performance Harmonic Balancer Bolts 12557840 Bolt, Gen. 3 and 4 LS engines only. Steel, Cadmium, Hex Head, Chevy, 4.8, 5.3, 5.7, 6.0, 6.2L Each

Chevrolet Performance

Chevrolet Performance Harmonic Balancer Bolts 12557840 Bolt, Gen. 3 and 4 LS engines only. Steel, Cadmium, Hex Head, Chevy, 4.8, 5.3, 5.7, 6.0, 6.2L Each

SKU: NAL12557840

Harmonic Balancer Bolts
A$28.36
IN STOCK! Est Ship 4-7 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.
View cart 0
We accept
American Express
Mastercard
Visa
PayPal Checkout
Direct Deposit
Afterpay
Apple Pay
Google Pay
Zip Pay

Description

Chevrolet Performance harmonic balancer bolts are made of high-quality steel and are heat-treated for extra strength. They feature a hex head to prevent socket slippage when loosening or tightening. The bolts are available in a variety of lengths, thread sizes, and finishes. Order the fasteners recommended for your year/make and engine application.

Part Type

Crank/Balancer Bolt

Data: v4.2 - Upd: 2026-10-14 09:18:21

Specifications

Product Attributes - Brand
Chevrolet Performance
Product Attributes - Manufacturer's Part Number
12557840
Product Attributes - Part Type
Harmonic Balancer Bolts
Product Attributes - Product Line
Chevrolet Performance Harmonic Balancer Bolts
Product Attributes - UPC
00195491151857
Product Attributes - Thread Size
M16 x 2.0
Product Attributes - Underhead Length (in.)
4.055 in.
Product Attributes - Head Style
Hex
Product Attributes - Washer Included
Yes
Product Attributes - Fastener Material
Steel
Product Attributes - Fastener Color
Cadmium plated
Product Attributes - Quantity
Sold individually.
Product Attributes - Notes
For use in Gen. 3/4 LS engines only. Use of this bolt in a Gen. 5 LT can result in an oil leak.

Reference Information

Brand Name/s Chevrolet Performance
StreetFX SKU nal12557840
SFX Item ID 5065678
Supplier Item Code 5065678
Manufacturer SKU 12557840
Manufacturer UPC N/A
Alternative References GMP12557840, 6.2L

Compatibility

Application Data
  • MakeBUICK
    ModelLACROSSE
    SubmodelSUPER
    Beginning Year2008
    Ending Year2009
    Engine TypeV8
    Liter5.3
    CID325
    CC5328
    Engine Size5.3L/325
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine VIN CodeC
  • MakeBUICK
    ModelRAINIER
    SubmodelCXL
    Beginning Year2004
    Ending Year2004
    Engine TypeV8
    Liter5.3
    CID325
    CC5328
    Engine Size5.3L/325
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine VIN CodeP
  • MakeBUICK
    ModelRAINIER
    SubmodelCXL
    Beginning Year2005
    Ending Year2007
    Engine TypeV8
    Liter5.3
    CID325
    CC5328
    Engine Size5.3L/325
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine VIN CodeM
  • MakeBUICK
    ModelRAINIER
    SubmodelCXL PLUS
    Beginning Year2004
    Ending Year2004
    Engine TypeV8
    Liter5.3
    CID325
    CC5328
    Engine Size5.3L/325
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine VIN CodeP
  • MakeBUICK
    ModelRAINIER
    SubmodelCXL PLUS
    Beginning Year2005
    Ending Year2005
    Engine TypeV8
    Liter5.3
    CID325
    CC5328
    Engine Size5.3L/325
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine VIN CodeM
  • MakeCADILLAC
    ModelATS
    SubmodelBASE
    Beginning Year2016
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CID122
    CC1998
    Engine Size2.0L/122
    Engine FamilyGM 4-cylinder
    Engine VIN CodeX
  • MakeCADILLAC
    ModelATS
    SubmodelBASE
    Beginning Year2016
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CID122
    CC1998
    Engine Size2.0L/122
    Engine FamilyGM 4-cylinder
    Engine VIN CodeX
  • MakeCADILLAC
    ModelATS
    SubmodelLUXURY
    Beginning Year2016
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CID122
    CC1998
    Engine Size2.0L/122
    Engine FamilyGM 4-cylinder
    Engine VIN CodeX
  • MakeCADILLAC
    ModelATS
    SubmodelLUXURY
    Beginning Year2016
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CID122
    CC1998
    Engine Size2.0L/122
    Engine FamilyGM 4-cylinder
    Engine VIN CodeX
  • MakeCADILLAC
    ModelATS
    SubmodelPERFORMANCE
    Beginning Year2016
    Ending Year2016
    Engine TypeL4
    Liter2.0
    CID122
    CC1998
    Engine Size2.0L/122
    Engine FamilyGM 4-cylinder
    Engine VIN CodeX
  • MakeCADILLAC
    ModelATS
    SubmodelPERFORMANCE
    Beginning Year2016
    Ending Year2016
    Engine TypeL4
    Liter2.0
    CID122
    CC1998
    Engine Size2.0L/122
    Engine FamilyGM 4-cylinder
    Engine VIN CodeX
  • MakeCADILLAC
    ModelATS
    SubmodelPREMIUM
    Beginning Year2016
    Ending Year2016
    Engine TypeL4
    Liter2.0
    CID122
    CC1998
    Engine Size2.0L/122
    Engine FamilyGM 4-cylinder
    Engine VIN CodeX
  • MakeCADILLAC
    ModelATS
    SubmodelPREMIUM
    Beginning Year2016
    Ending Year2016
    Engine TypeL4
    Liter2.0
    CID122
    CC1998
    Engine Size2.0L/122
    Engine FamilyGM 4-cylinder
    Engine VIN CodeX
  • MakeCADILLAC
    ModelCT6
    SubmodelBASE
    Beginning Year2016
    Ending Year2018
    Engine TypeL4
    Liter2.0
    CID122
    CC1998
    Engine Size2.0L/122
    Engine FamilyGM 4-cylinder
    Engine VIN CodeX
  • MakeCADILLAC
    ModelCT6
    SubmodelLUXURY
    Beginning Year2016
    Ending Year2018
    Engine TypeL4
    Liter2.0
    CID122
    CC1998
    Engine Size2.0L/122
    Engine FamilyGM 4-cylinder
    Engine VIN CodeX
  • MakeCADILLAC
    ModelCTS
    SubmodelBASE
    Beginning Year2014
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CID122
    CC1998
    Engine Size2.0L/122
    Engine FamilyGM 4-cylinder
    Engine VIN CodeX
  • MakeCADILLAC
    ModelCTS
    SubmodelBASE
    Beginning Year2014
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CID122
    CC1998
    Engine Size2.0L/122
    Engine FamilyGM 4-cylinder
    Engine VIN CodeX
  • MakeCADILLAC
    ModelCTS
    SubmodelLUXURY
    Beginning Year2014
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CID122
    CC1998
    Engine Size2.0L/122
    Engine FamilyGM 4-cylinder
    Engine VIN CodeX
  • MakeCADILLAC
    ModelCTS
    SubmodelLUXURY
    Beginning Year2014
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CID122
    CC1998
    Engine Size2.0L/122
    Engine FamilyGM 4-cylinder
    Engine VIN CodeX
  • MakeCADILLAC
    ModelCTS
    SubmodelPERFORMANCE
    Beginning Year2014
    Ending Year2016
    Engine TypeL4
    Liter2.0
    CID122
    CC1998
    Engine Size2.0L/122
    Engine FamilyGM 4-cylinder
    Engine VIN CodeX
  • MakeCADILLAC
    ModelCTS
    SubmodelPERFORMANCE
    Beginning Year2014
    Ending Year2016
    Engine TypeL4
    Liter2.0
    CID122
    CC1998
    Engine Size2.0L/122
    Engine FamilyGM 4-cylinder
    Engine VIN CodeX
  • MakeCADILLAC
    ModelCTS
    SubmodelPREMIUM
    Beginning Year2014
    Ending Year2016
    Engine TypeL4
    Liter2.0
    CID122
    CC1998
    Engine Size2.0L/122
    Engine FamilyGM 4-cylinder
    Engine VIN CodeX
  • MakeCADILLAC
    ModelCTS
    SubmodelPREMIUM
    Beginning Year2014
    Ending Year2016
    Engine TypeL4
    Liter2.0
    CID122
    CC1998
    Engine Size2.0L/122
    Engine FamilyGM 4-cylinder
    Engine VIN CodeX
  • MakeCADILLAC
    ModelCTS
    SubmodelV
    Beginning Year2004
    Ending Year2005
    Engine TypeV8
    Liter5.7
    CID346
    Engine Size5.7L/346
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine VIN CodeS
  • MakeCADILLAC
    ModelESCALADE
    SubmodelBASE
    Beginning Year2002
    Ending Year2002
    Engine TypeV8
    Liter5.3
    CID325
    CC5328
    Engine Size5.3L/325
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine VIN CodeT

Loading compatibility information...

Keep shopping

More from Chevrolet Performance