Kb Performance
KB Performance Super-Duty Big Bore Piston Kit 4.250" +0.005" 11.4:1 CR - KB576LCA.005 For Harley Touring / Tri / Softail / Electra Glide 2017-2026
MPN:
KB576LCA.005
SKU:
0910-6178
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Kb Performance
KB Performance Super-Duty Big Bore Piston Kit 4.250" +0.005" 11.4:1 CR - KB576LCA.005 For Harley Touring / Tri / Softail / Electra Glide 2017-2026
MPN:
KB576LCA.005
SKU:
0910-6178
SKU:
0910-6178
Updates stock 107", 114” or 117” motor to 124” or 128” when using 4.250” big bore cylinders
Valve pockets are designed to accept up to +4.00 mm oversized intake and exhaust valves
Type 3 hard-anodized crown offers corrosion resistance for alcohol-added fuels
Type 3 hard-anodized top ring groove eliminates micro-welding of ring to the groove and gives a hard-flat surface for ring to rotate on
OE-style round wire locks are easily installed
Heavy-duty wrist pins with true .9270” diameter to fit rods correctly
Line2Line AST skirt coating starts out with a near-zero wall clearance and through the break-in period hones the cylinders to produce the correct oil wedge, keeping the piston square to the cylinder for best ring seal and quiet operation
Kit includes pistons, rings, pins and locks
Specs
Bore Oversize
+0.005"
Product Name
Piston Kit
Riding Style
Street
Bore - Oversize
+0,005"
Units
Kit
Displacement
124"
2017-2022
Harley-Davidson
Road King FLHR/FLHRC
2017-2026
Harley-Davidson
Street Glide FLHX/FLHXS
2017-2024
Harley-Davidson
Tri Glide Ultra Classic FLHTCUTG
2018-2019
Harley-Davidson
Softail Breakout FXBR
2018-2020
Harley-Davidson
Softail Fat Boy FLFB
2018-2021
Harley-Davidson
Softail Heritage Classic FLHC
2018-2020
Harley-Davidson
Softail Low Rider FXLR
2018-2021
Harley-Davidson
Softail Slim FLSL
2018-2024
Harley-Davidson
Softail Sport Glide FLSB
2018-2020
Harley-Davidson
Softail Street Bob FXBB
2019-2022
Harley-Davidson
Electra Glide Standard FLHT
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
$446.95
Unit price
Shipping calculated at checkout.
Product Details
Features
- Updates stock 107", 114” or 117” motor to 124” or 128” when using 4.250” big bore cylinders
- Valve pockets are designed to accept up to +4.00 mm oversized intake and exhaust valves
- Type 3 hard-anodized crown offers corrosion resistance for alcohol-added fuels
- Type 3 hard-anodized top ring groove eliminates micro-welding of ring to the groove and gives a hard-flat surface for ring to rotate on
- OE-style round wire locks are easily installed
- Heavy-duty wrist pins with true .9270” diameter to fit rods correctly
- Line2Line AST skirt coating starts out with a near-zero wall clearance and through the break-in period hones the cylinders to produce the correct oil wedge, keeping the piston square to the cylinder for best ring seal and quiet operation
- Kit includes pistons, rings, pins and locks
Specs
| Bore Oversize | +0.005" |
| Product Name | Piston Kit |
| Riding Style | Street |
| Bore - Oversize | +0,005" |
| Units | Kit |
| Displacement | 124" |
| 2017-2022 | Harley-Davidson | Road King FLHR/FLHRC |
| 2017-2026 | Harley-Davidson | Street Glide FLHX/FLHXS |
| 2017-2024 | Harley-Davidson | Tri Glide Ultra Classic FLHTCUTG |
| 2018-2019 | Harley-Davidson | Softail Breakout FXBR |
| 2018-2020 | Harley-Davidson | Softail Fat Boy FLFB |
| 2018-2021 | Harley-Davidson | Softail Heritage Classic FLHC |
| 2018-2020 | Harley-Davidson | Softail Low Rider FXLR |
| 2018-2021 | Harley-Davidson | Softail Slim FLSL |
| 2018-2024 | Harley-Davidson | Softail Sport Glide FLSB |
| 2018-2020 | Harley-Davidson | Softail Street Bob FXBB |
| 2019-2022 | Harley-Davidson | Electra Glide Standard FLHT |
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
- Updates stock 107", 114” or 117” motor to 124” or 128” when using 4.250” big bore cylinders
- Valve pockets are designed to accept up to +4.00 mm oversized intake and exhaust valves
- Type 3 hard-anodized crown offers corrosion resistance for alcohol-added fuels
- Type 3 hard-anodized top ring groove eliminates micro-welding of ring to the groove and gives a hard-flat surface for ring to rotate on
- OE-style round wire locks are easily installed
- Heavy-duty wrist pins with true .9270” diameter to fit rods correctly
- Line2Line AST skirt coating starts out with a near-zero wall clearance and through the break-in period hones the cylinders to produce the correct oil wedge, keeping the piston square to the cylinder for best ring seal and quiet operation
- Kit includes pistons, rings, pins and locks
Specs
| Bore Oversize | +0.005" |
| Product Name | Piston Kit |
| Riding Style | Street |
| Bore - Oversize | +0,005" |
| Units | Kit |
| Displacement | 124" |
| 2017-2022 | Harley-Davidson | Road King FLHR/FLHRC |
| 2017-2026 | Harley-Davidson | Street Glide FLHX/FLHXS |
| 2017-2024 | Harley-Davidson | Tri Glide Ultra Classic FLHTCUTG |
| 2018-2019 | Harley-Davidson | Softail Breakout FXBR |
| 2018-2020 | Harley-Davidson | Softail Fat Boy FLFB |
| 2018-2021 | Harley-Davidson | Softail Heritage Classic FLHC |
| 2018-2020 | Harley-Davidson | Softail Low Rider FXLR |
| 2018-2021 | Harley-Davidson | Softail Slim FLSL |
| 2018-2024 | Harley-Davidson | Softail Sport Glide FLSB |
| 2018-2020 | Harley-Davidson | Softail Street Bob FXBB |
| 2019-2022 | Harley-Davidson | Electra Glide Standard FLHT |
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 |
|---|---|---|
| 0910-6178 | KB576LCA.005 | 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 Super-Duty Big Bore Piston Kit 4.250" +0.005&qu...
Regular price
$446.95
Unit price
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