KB PISTONS Super Duty Piston
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Upgrade your Milwaukee-Eight engine with the KB Pistons Super Duty 4.250 inch Bore M8 Piston. Designed for 107 to 124 cubic inch conversions with a standard size and 11.4:1 compression ratio, this direct replacement motor vehicle part delivers exceptional durability for 2017-2025 Harley Davidson motorcycles. Weighing 2.5 lbs, it is engineered to meet rigorous performance demands.
The piston incorporates advanced supplier features such as an anodized top ring groove and crown, forced wrist pin oiling, and round wire locks. It also utilizes a Line2Line abradable skirt coating at.003 inches total thickness for a zero initial fit that hones in for a tight, quiet running clearance. Complete with a premium Hastings steel nitride top ring and ductile Napier second ring set, be sure to verify fitment and size prior to ordering.
What shipping options are available?
Online orders will be shipped through FedEx, USPS, OnTrac, or other reputable shipping services based on what we determine to be the best option. We (do not) ship to P.O. boxes. Please contact us if you are interested in an expedited shipping on your order.
Do you ship outside of the USA?
No, unfortunately at this time we only ship to the lower 48 states in the USA.
Do you ship to Alaska and Hawaii?
Yes, we do ship to Alaska and Hawaii.
What could cause a shipping delay?
Shipping delay can occur when the wrong address or zip code is submitted for the shipping address. If the shipping company can not deliver the package we will contact you via phone or email.
During the holiday season shipping delivery may vary.
How do I return an item?
Please log in to your account and go to the order to request a return. Items can be returned within 30 days after delivery. Items must be in new/unused condition with all of the original packaging. If you purchased the package protection, returns are free. If you did not, customers who make a mistake with their order are responsible for return shipping costs. Discounted return labels will be provided for those and subtracted from the refund. If we have made a mistake, please email with
pictures of what you received including the part number and the year, make and
model of your machine if applicable. If we determine we made an error we will
cover the return shipping.
If an item needs to be returned the shipping fees are the customer's responsibility.
Amount of refund will be based on the purchase price of your product.