Piston Kit Low Dome Mercury Mariner 2.875 Bore Size .030 774-9137A11 - GLM14050 .030 Oversize Low Dome Piston Kit for Mercury/Mariner OEM: 774-9137A11 Newer series engines with .650 deflector height for 2, 3, 4 6 cylinder inline direct charge engines with original bore size measuring 2.875. All GLM pistons come with a power port hole in the piston and can be used with non port cylinders, all GLM pistons use Keystone rings. All piston kits come with rings, pins and retainers. Low Dome piston kits can replace High Dome piston kits and will not affect engine?s operation. About Us Basic Power and its staff want you to feel 100% confident in your purchases. Here are a few reasons why: Multi-Million dollar inventory In Stock and Ready to Ship from our huge inventory Shipped Same Day when order is placed before 2pm Highly Technical staff available Tracking numbers are visible through purchase history right from your computer We sell ONLY quality marine specific parts Contact us through messaging system PayPal payments and Credit Cards through Payment System are accepted Ships best way via USPS or UPS Shipping Shipping rates of $12 and less are eligible for combined shipping. Items with $13 or more shipping cannot have the shipping costs combined. Our normal handling time is 1-2 days. Payment We accept payment by any of the following methods: Payment System(Visa,MasterCard,PayPal,Stripe and many others)! Please pay as soon as possible after winning an sale, as that will allow us to post your item to you sooner! Returns No Returns Accepted on this item.