Description
Kb Performance - KB576LCA.STD - Piston Kit - 4.250" Standard - 11.4:1 CR - 124" Big Bore - 107" M8
Features
- Updates stock 107\
- 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 0.9270” 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
- Requires 4.250" bore cylinder sold separately.
Specs
| Stroke Length Imperial | 4.375'' |
| Style | Forged |
| Units | Kit |
| Displacement | 124'' |
| Piston Material | 4032 Aluminum Alloy |
| Piston Head Shape | Domed |
| Model | Super Duty |
| Product Name | Piston Kit |
| Riding Style | Street |
| Bore Size Imperial | 4.250'' |
| Type | Big Bore |
| Bore - Oversize | Standard |
| Bore Oversize - Imperial | Standard |
| Compression Ratio Imperial | 11.4:1 |
Fitment
| 2017-2018 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2019-2020 | Harley-Davidson | Electra Glide Standard EFI FLHTI |
| 2017-2019 | Harley-Davidson | Electra Glide Ultra Classic EFI FLHTCUI |
| 2017-2020 | Harley-Davidson | Electra Glide Ultra Limited FLHTK |
| 2017-2019 | Harley-Davidson | Electra Glide Ultra Limited Low FLHTKL |
| 2017-2018, 2020 | Harley-Davidson | Freewheeler FLRT |
| 2017-2020 | Harley-Davidson | Road Glide Custom FLTRX |
| 2017, 2019-2020 | Harley-Davidson | Road Glide Special FLTRXS |
| 2017-2019 | Harley-Davidson | Road Glide Ultra FLTRU |
| 2017-2020 | Harley-Davidson | Road King EFI FLHR |
| 2017 | Harley-Davidson | Road King Police FLHP |
| 2018-2020 | Harley-Davidson | Road King Special FLHRXS |
| 2019-2020 | Harley-Davidson | Softail Deluxe FLDE |
| 2018-2019 | Harley-Davidson | Softail Fat Bob FXFB |
| 2018-2019 | Harley-Davidson | Softail Fat Boy FLFB |
| 2018-2020 | Harley-Davidson | Softail Heritage Classic FLHC |
| 2018-2019 | Harley-Davidson | Softail Low Rider FXLR |
| 2018-2020 | Harley-Davidson | Softail Slim FLSL |
| 2018-2021 | Harley-Davidson | Softail Sport Glide FLSB |
| 2020 | Harley-Davidson | Softail Standard FXST |
| 2018-2020 | Harley-Davidson | Softail Street Bob FXBB |
| 2018-2020 | Harley-Davidson | Street Glide EFI FLHX |
| 2017, 2019-2020 | Harley-Davidson | Street Glide Special FLHXS |
| 2018-2020 | Harley-Davidson | Tri Glide Ultra Classic FLHTCUTG |
