Genuine OEM 1987 Mercury Grand Marquis parts are made using the original design, the high standards, in the Mercury official factories, and all of these ensure that they always fit perfectly and easily. FordPartsDeal.com is a trusted source for finding these authentic OEM Cylinder Head & Valves parts at very competitive prices. Our professional team is here to help you choose the right 1987 Mercury Grand Marquis Rocker Arm, Valve Cover Gasket, Cylinder Head, Cylinder Head Gasket, and our fast delivery options ensure that your parts are always delivered quickly.