Kb Performance
KB Performance Hypereutectic Piston Kit 3.437" +0.020" 9.0:1 CR 74" Big Twin - KB263.020 For Harley Motorcycles 1941-1979
MPN:
KB263.020
SKU:
DS-751204
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Kb Performance
KB Performance Hypereutectic Piston Kit 3.437" +0.020" 9.0:1 CR 74" Big Twin - KB263.020 For Harley Motorcycles 1941-1979
MPN:
KB263.020
SKU:
DS-751204
SKU:
DS-751204
Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy
Allow 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 and pin lock rings available 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.
Specs
Bore Size
3.437"
Riding Style
Street
Bore Oversize
+0.020"
Piston Material
Hypereutectic Alloy
Product Name
Piston Kit
Units
Kit
Compression Ratio
9.0:1
1941-1979
Harley-Davidson
FL
1941-1947
Harley-Davidson
Knucklehead FL
1949-1957
Harley-Davidson
Hydra Glide FL
1953-1964
Harley-Davidson
FLF
1955-1964,1970-1972
Harley-Davidson
FLHF
1955-1957
Harley-Davidson
Hydra-Glide FLH
1958-1964
Harley-Davidson
Duo Glide FL
1958-1964
Harley-Davidson
Duo-Glide FLH
1965-1969,1978-1979
Harley-Davidson
1200 Electra Glide FLH
1965-1979
Harley-Davidson
Electra Glide FL
1965-1969
Harley-Davidson
FLFB
1965-1969
Harley-Davidson
FLHB
1965-1969
Harley-Davidson
FLHFB
1970-1979
Harley-Davidson
Electra Glide FLH
1971-1978
Harley-Davidson
Super Glide FX
1973-1979
Harley-Davidson
Super Glide FXE
1977-1979
Harley-Davidson
Low Rider FXS
1979
Harley-Davidson
1200 Fat Bob FXEF
1979
Harley-Davidson
1200 Low Rider FXS
1979
Harley-Davidson
1200 Super Glide FX
1979
Harley-Davidson
1200 Super Glide FXE
1979
Harley-Davidson
Electra Glide Classic FLHC
1979
Harley-Davidson
Electra Glide Sport FLHS
1979
Harley-Davidson
Super Glide 80 FXE
Fitment DisclosureThis quick reference fitment information is provided to direct you to our catalog information and the manufacturer's information. Consult manufacturer publication(s) and/or website(s) for specific fitment and application information and other important information. This fitment information is based upon the stock version of the motorcycle or unit referenced and any accessory added or other modification could invalidate the quick reference information provided.
Regular price
$239.95
Unit price
Shipping calculated at checkout.
Product Details
Features
- Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy
- Allow 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 and pin lock rings available 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.
Specs
| Bore Size | 3.437" |
| Riding Style | Street |
| Bore Oversize | +0.020" |
| Piston Material | Hypereutectic Alloy |
| Product Name | Piston Kit |
| Units | Kit |
| Compression Ratio | 9.0:1 |
| 1941-1979 | Harley-Davidson | FL |
| 1941-1947 | Harley-Davidson | Knucklehead FL |
| 1949-1957 | Harley-Davidson | Hydra Glide FL |
| 1953-1964 | Harley-Davidson | FLF |
| 1955-1964,1970-1972 | Harley-Davidson | FLHF |
| 1955-1957 | Harley-Davidson | Hydra-Glide FLH |
| 1958-1964 | Harley-Davidson | Duo Glide FL |
| 1958-1964 | Harley-Davidson | Duo-Glide FLH |
| 1965-1969,1978-1979 | Harley-Davidson | 1200 Electra Glide FLH |
| 1965-1979 | Harley-Davidson | Electra Glide FL |
| 1965-1969 | Harley-Davidson | FLFB |
| 1965-1969 | Harley-Davidson | FLHB |
| 1965-1969 | Harley-Davidson | FLHFB |
| 1970-1979 | Harley-Davidson | Electra Glide FLH |
| 1971-1978 | Harley-Davidson | Super Glide FX |
| 1973-1979 | Harley-Davidson | Super Glide FXE |
| 1977-1979 | Harley-Davidson | Low Rider FXS |
| 1979 | Harley-Davidson | 1200 Fat Bob FXEF |
| 1979 | Harley-Davidson | 1200 Low Rider FXS |
| 1979 | Harley-Davidson | 1200 Super Glide FX |
| 1979 | Harley-Davidson | 1200 Super Glide FXE |
| 1979 | Harley-Davidson | Electra Glide Classic FLHC |
| 1979 | Harley-Davidson | Electra Glide Sport FLHS |
| 1979 | Harley-Davidson | Super Glide 80 FXE |
Fitment Disclosure
This quick reference fitment information is provided to direct you to our catalog information and the manufacturer's information. Consult manufacturer publication(s) and/or website(s) for specific fitment and application information and other important information. This fitment information is based upon the stock version of the motorcycle or unit referenced and any accessory added or other modification could invalidate the quick reference information provided.Product Description
Features
- Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy
- Allow 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 and pin lock rings available 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.
Specs
| Bore Size | 3.437" |
| Riding Style | Street |
| Bore Oversize | +0.020" |
| Piston Material | Hypereutectic Alloy |
| Product Name | Piston Kit |
| Units | Kit |
| Compression Ratio | 9.0:1 |
| 1941-1979 | Harley-Davidson | FL |
| 1941-1947 | Harley-Davidson | Knucklehead FL |
| 1949-1957 | Harley-Davidson | Hydra Glide FL |
| 1953-1964 | Harley-Davidson | FLF |
| 1955-1964,1970-1972 | Harley-Davidson | FLHF |
| 1955-1957 | Harley-Davidson | Hydra-Glide FLH |
| 1958-1964 | Harley-Davidson | Duo Glide FL |
| 1958-1964 | Harley-Davidson | Duo-Glide FLH |
| 1965-1969,1978-1979 | Harley-Davidson | 1200 Electra Glide FLH |
| 1965-1979 | Harley-Davidson | Electra Glide FL |
| 1965-1969 | Harley-Davidson | FLFB |
| 1965-1969 | Harley-Davidson | FLHB |
| 1965-1969 | Harley-Davidson | FLHFB |
| 1970-1979 | Harley-Davidson | Electra Glide FLH |
| 1971-1978 | Harley-Davidson | Super Glide FX |
| 1973-1979 | Harley-Davidson | Super Glide FXE |
| 1977-1979 | Harley-Davidson | Low Rider FXS |
| 1979 | Harley-Davidson | 1200 Fat Bob FXEF |
| 1979 | Harley-Davidson | 1200 Low Rider FXS |
| 1979 | Harley-Davidson | 1200 Super Glide FX |
| 1979 | Harley-Davidson | 1200 Super Glide FXE |
| 1979 | Harley-Davidson | Electra Glide Classic FLHC |
| 1979 | Harley-Davidson | Electra Glide Sport FLHS |
| 1979 | Harley-Davidson | Super Glide 80 FXE |
Fitment Disclosure
This quick reference fitment information is provided to direct you to our catalog information and the manufacturer's information. Consult manufacturer publication(s) and/or website(s) for specific fitment and application information and other important information. This fitment information is based upon the stock version of the motorcycle or unit referenced and any accessory added or other modification could invalidate the quick reference information provided.Part Numbers
| Store SKU | MFR. Product # | Availability |
|---|---|---|
| DS-751204 | KB263.020 | In Stock |
Fitment
This product is vehicle specific.
Select your vehicle to confirm fitment.
This Product Fits
Fitment Disclosure
This quick reference fitment information is provided to direct you to our catalog information and the manufacturer's information. Consult manufacturer publication(s) and/or website(s) for specific fitment and application information and other important information. This fitment information is based upon the stock version of the motorcycle or unit referenced and any accessory added or other modification could invalidate the quick reference information provided.
Customer Reviews
KB Performance Hypereutectic Piston Kit 3.437" +0.020" 9....
Regular price
$239.95
Unit price
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