KB PISTONS - KB542LCA.STD - PISTON SUPER DUTY 4.125" BORE M8 114/117 TO 120" STD - '17-'25 Harley Davidson CVO Softail Pro Street Breakout
The KB PISTONS PISTON SUPER DUTY 4.125" BORE M8 114/117 TO 120" STD features anodized top ring groove and crown, Round wire locks, and Forced wrist pin oiling.
Features
- Anodized top ring groove and crown
- Line2Line Abradable skirt coating applied to .003" total thickness for a ZERO initial fit to allow coating to hone in for a tight quiet running clearance
- Round wire locks
- Premium Hastings 1.2mm 1.2mm 3.0mm Steel Nitride top ring with a Ductile Napier second ring
- Forced wrist pin oiling
- M8 version with flat top 1.2cc with compression height 1.083", valve pockets sized to accommodate 1mm oversize valves
- All Rings, Wrist Pins and Wrist Pin Locks included.
- Pistons sold as a PAIR.
Specs
- Segment: V-Twin
Frequently Asked Questions - KB PISTONS - KB542LCA.STD - PISTON SUPER DUTY 4.125" BORE M8 114/117 TO 120" STD - '17-'25 Harley-Davidson Softail Low Rider ST FXLRST
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.
