KB PERFORMANCE - KB542LCA.020 - Super-Duty Piston Kit - '17-'24 Harley-Davidson Electra Glide Police FLHTPI, Electra Glide Ultra Classic
This .020-over Super-Duty Piston Kit from KB Performance fits '17-'24 Harley-Davidson engines with a flat-top 1.2cc design and oversized valve pockets that accept valves up to 1.00mm larger than stock. Line2Line AST skirt coating starts at near-zero wall clearance and hones itself during break-in for a square, quiet fit, while Type 3 hard-anodized crown and top ring groove resist corrosion from alcohol fuels and prevent ring micro-welding. OE-style round wire locks and heavy-duty 0.9270" wrist pins round out the kit, which includes pistons, rings, pins, and locks. Made in the USA.
Features
- New skirt coating technology is applied to the entire thickness of the piston-to-wall clearance for a zero install clearance; coating then abrades in on start-up to hone for the perfect fit per cylinder
- Hard anodized top ring groove eliminates micro welding of the ring to the groove; this maintains a flat and smooth surface for the best ring seal and top ring groove
- Teflon based skirt coating eliminates piston rock for the best possible ring seal with no piston slap noise
- Hard anodized crown to aid in heat deflection and to reduce corrosion from alcohol fuels
- Flat Top 1.2 cc design with oversized valve pockets to accept 1.00 mm larger valves
- Includes pistons, rings, pins and clips
- Made in the USA
Specs
- Bore - Oversize: +0.020"
- Riding Style: Street
- Stroke Length: 4.500"
- Bore Size: 4.125"
- Model: Super Duty
- Piston Material: 4032 Aluminum Alloy
- Compression Ratio: 11.0:1
- Style: Forged
- Units: Kit
- Product Name: Piston Kit
- Displacement: 120"
- Piston Head Shape: Flat Top
Frequently Asked Questions - KB PERFORMANCE - KB542LCA.020 - Super-Duty Piston Kit - '17-'24 Harley-Davidson Electra Glide Police FLHTPI, Electra Glide Ultra Classic
How do I know if this part fits my vehicle?
Check the fitment information listed on this page against your exact year, make, model, and (where applicable) trim, engine size, or configuration. If your exact vehicle isn't listed, or you're not sure, use the product chat on this page or contact our support team before ordering - we're glad to help confirm fitment.
What does it mean if a product is listed as universal fit?
Universal fit means the product is designed to work across a range of vehicles, not that it's guaranteed to fit every one. Compare the listed measurements, mounting requirements, and connector or hardware specs against your specific vehicle before ordering, since some installations may need additional hardware or minor fabrication.
Where can I find installation instructions for this product?
General installation notes are provided above where available. For detailed step-by-step instructions, refer to the manufacturer's documentation included with the product, or use the product chat on this page for questions about difficulty, required tools, or whether professional installation is recommended.
What if I have more questions about this product?
Use the product chat on this page for fitment, specs, installation, and compatibility questions, or contact our support team directly for help before you order.
