It is a two cycle engine. There are ports in the cylinders.As the pistons open up to the ports the supercharged fuel mixture is pushed through the two cylinder's and exhaust gases pushed out. Around the two center cylinders there is space where charged mixture is stored untill the ports open again.
The item "Model T Ford Accessory Winfield two up two down super charged engine" is in sale since Monday, February 4, 2019. This item is in the category "eBay Motors\Parts & Accessories\Vintage Car & Truck Parts\Engines & Components\Complete Engines".The seller is "modelt96" and is located in Iola, Kansas. This item can be shipped to United States.