Custom Bore sizes and compression ratios available, these are custom made to order with a 2-4 week turn around time. Typical flycuts are .200 or .250 and include hard anodized coating on the entire piston. We will call once your order is placed to ensure you get the correct pistons for your application and HP range. Bore sizes range from 4.020″ to 4.500″. These are the same pistons we run in our 2600hp SS truck, and use in most all of our engine builds. Piston rings are available as well as tool steel or standard wrist pins.