KB Performance Piston Kit - 3.875" Standard - 10.5:1 CR - 95" Twin Cam Big Bore

KB Performance

KB Performance

SKU: 90-90525

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Product Details

KB Performance Piston Kit - 3.875" Standard - 10.5:1 CR - 95" Twin Cam Big Bore. Fits 58 Harley-Davidson models from 1999 to 2006, including the 15th Anniversary Fat Boy FLSTF, Electra Glide Classic FLHTC and Electra Glide Police FLHTPI. Manufacturer part number KB411STD.

Features

  • Manufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloy
  • Allows a tighter fit and longer piston and ring life
  • Diamond-machined pistons are held to plus or minus one gram weight and less than one-half-thousandth-inch (.0005") tolerances from piston to piston
  • Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings
  • Replacement piston rings sold separately
  • KB pistons can be installed tighter than other pistons. This results in less piston rock and better ring seal. Please read instructions included with piston for correct piston clearance.
  • Due to the thermal conductivity and design of KB pistons, special attention is required to the top ring end gap. Please read instructions furnished with piston for correct ring installation.

Specifications

UPC
800745152244
Vendor Part Number
KB411STD
Package Height
4.78
Package Length
9.55
Package Width
4.8
Parts Unlimited #
DS-751286
Bore Oversize - Imperial
Standard
Bore Size Imperial
3.875"
Brand
KB Performance
Compression Ratio
10.5:1
Displacement
95"
Piston Head Shape
Domed
Piston Material
Hypereutectic Alloy
Riding Style
Street
Ring Material
Moly Coated
Stroke Length (in)
4.000"
Unit of Measure
Kit

Fitment

58 vehicles
Year Make / Model Model
2005 Harley-Davidson
15th Anniversary Fat Boy FLSTF 15th Anniversary Fat Boy FLSTF
2006 Harley-Davidson
Electra Glide Classic FLHTC Electra Glide Classic FLHTC
1999 - 2006 Harley-Davidson
Electra Glide Police FLHTPI Electra Glide Police FLHTPI
1999 - 2006 Harley-Davidson
Electra Glide Police FLHTP Electra Glide Police FLHTP
2000 - 2002 Harley-Davidson
Electra Glide Standard EFI FLHTI Electra Glide Standard EFI FLHTI
1999 - 2006 Harley-Davidson
Electra Glide Ultra Classic FLHTCU Electra Glide Ultra Classic FLHTCU
1999 - 2006 Harley-Davidson
FLHR Road King FLHR Road King
1999 - 2006 Harley-Davidson
FLHRCI Road King Classic FLHRCI Road King Classic
2000 - 2006 Harley-Davidson
FLHRI Road King FLHRI Road King
2004 - 2006 Harley-Davidson
FLHRS Road King Custom FLHRS Road King Custom
2004 - 2006 Harley-Davidson
FLHRSI Road King Custom FLHRSI Road King Custom
1999 - 2006 Harley-Davidson
FLHT Electra Glide Standard FLHT Electra Glide Standard
1999 - 2005 Harley-Davidson
FLHTC Electra Glide Classic FLHTC Electra Glide Classic
1999 - 2006 Harley-Davidson
FLHTCI Electra Glide Classic FLHTCI Electra Glide Classic
1999 - 2006 Harley-Davidson
FLHTCUI Electra Glide Ultra Classic FLHTCUI Electra Glide Ultra Classic
2003 - 2006 Harley-Davidson
FLHTI Electra Glide Standard FLHTI Electra Glide Standard
2006 Harley-Davidson
FLHX Street Glide FLHX Street Glide
2006 Harley-Davidson
FLHXI Street Glide FLHXI Street Glide
2006 Harley-Davidson
FLST Heritage Softail FLST Heritage Softail
1999 - 2006 Harley-Davidson
FLSTC Heritage Softail Classic FLSTC Heritage Softail Classic
2001 - 2006 Harley-Davidson
FLSTCI Heritage Softail Classic FLSTCI Heritage Softail Classic
1999 - 2006 Harley-Davidson
FLSTF Fat Boy FLSTF Fat Boy
2001 - 2006 Harley-Davidson
FLSTFI Fat Boy FLSTFI Fat Boy
2006 Harley-Davidson
FLSTI Heritage Softail FLSTI Heritage Softail
2005 - 2006 Harley-Davidson
FLSTN Softail Deluxe FLSTN Softail Deluxe
2005 - 2006 Harley-Davidson
FLSTNI Softail Deluxe FLSTNI Softail Deluxe
1999 - 2004 Harley-Davidson
FLSTS Heritage Springer FLSTS Heritage Springer
2005 - 2006 Harley-Davidson
FLSTSC Softail Springer Classic FLSTSC Softail Springer Classic
2005 - 2006 Harley-Davidson
FLSTSCI Softail Springer Classic FLSTSCI Softail Springer Classic
2001 - 2003 Harley-Davidson
FLSTSI Heritage Springer FLSTSI Heritage Springer
1999 - 2006 Harley-Davidson
FLTR Road Glide FLTR Road Glide
1999 - 2006 Harley-Davidson
FLTRI Road Glide FLTRI Road Glide
1999 - 2006 Harley-Davidson
FXD Dyna Super Glide FXD Dyna Super Glide
2006 Harley-Davidson
FXDB Street Bob FXDB Street Bob
2006 Harley-Davidson
FXDBI Street Bob FXDBI Street Bob
2005 Harley-Davidson
FXDC Super Glide Custom FXDC Super Glide Custom
2005 - 2006 Harley-Davidson
FXDCI Super Glide Custom FXDCI Super Glide Custom
2004 - 2006 Harley-Davidson
FXDI Dyna Super Glide FXDI Dyna Super Glide
2006 Harley-Davidson
FXDI35 Dyna 35th Anniversary Super Glide FXDI35 Dyna 35th Anniversary Super Glide
1999 - 2005 Harley-Davidson
FXDL Dyna Low Rider FXDL Dyna Low Rider
2004 - 2006 Harley-Davidson
FXDLI Dyna Low Rider FXDLI Dyna Low Rider
1999 - 2000 Harley-Davidson
FXDS-Conv Dyna Convertible FXDS-Conv Dyna Convertible
1999 - 2006 Harley-Davidson
FXDWG Dyna Wide Glide FXDWG Dyna Wide Glide
2004 - 2006 Harley-Davidson
FXDWGI Dyna Wide Glide FXDWGI Dyna Wide Glide
1999 - 2005 Harley-Davidson
FXDX Dyna Super Glide Sport FXDX Dyna Super Glide Sport
2004 - 2005 Harley-Davidson
FXDXI Dyna Super Glide Sport FXDXI Dyna Super Glide Sport
2001 - 2003 Harley-Davidson
FXDXT Dyna Super Glide T-Sport FXDXT Dyna Super Glide T-Sport
2000 - 2006 Harley-Davidson
FXST Softail Standard FXST Softail Standard
2000 - 2006 Harley-Davidson
FXSTB Night Train FXSTB Night Train
2001 - 2006 Harley-Davidson
FXSTBI Night Train FXSTBI Night Train
2000 - 2006 Harley-Davidson
FXSTD Softail Deuce FXSTD Softail Deuce
2001 - 2006 Harley-Davidson
FXSTDI Softail Deuce FXSTDI Softail Deuce
2001 - 2006 Harley-Davidson
FXSTI Softail Standard FXSTI Softail Standard
2000 - 2006 Harley-Davidson
FXSTS Springer Softail FXSTS Springer Softail
2001 - 2006 Harley-Davidson
FXSTSI Springer Softail FXSTSI Springer Softail
2006 Harley-Davidson
Low Rider FXDL Low Rider FXDL
1999 Harley-Davidson
Road King EFI FLHR Road King EFI FLHR
2000 - 2003 Harley-Davidson
Wide Glide EFI FXDWGI Wide Glide EFI FXDWGI

Fitment Disclosure
For reference only, please consult your owner’s manual to confirm your fitment.


General Safety Warning
Failure to follow the manufacturer's recommendations and requirements can cause product failure resulting in serious injury or death. While effort has been taken to collect accurate fitment information, 43 Moto accepts no liability for loss or damage resulting from errors or omissions. If you believe any of the information provided is erroneous, please email [email protected].

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