Purchase link: FS-B400 engine kits: Toyan engine： You Must-have tool set: youtube: @stirlingkit instagram @stirlingkitinfo facebook @stirlingkit tiktok @stirlingkitforu The Toyan FS-B400 is a type of parallel 4 cylinder engine (flat) or also called a Boxer engine. Flat engines or Boxer engines are rarely used by car manufacturers. However, Porsche and Subaru manufacturers still faithfully use the Flat engine type. In principle, the Toyan FS-B400 machine simplifies the Boxer machine so that it is suitable for learning. because its shape is futuristic and artistic, it is very good for display in the office or for collection. #stirlingkit#whywenengine