P-Ayr plastic replica products are perfect for mock ups or decorative and display purposes. Each one is a faithful reproduction of the original, often with the cooperation of the original manufacturer. With the use of steel inserts for all bolt holes, and all specifications are held to OEM tolerances. You can bolt any factory component or accessory to a P-Ayr engine and it will fit. That's why many P-Ayr engines, transmissions and accessories are used to design and build chassis. They are perfect for mock-ups.