Boxer engines are popular engines used in Subaru and Porsche cars, such as the Subaru WRX STi and Porsche 911 GT3. The engines have cylinders that lay flat (not to be confused with a 180 degree V ...

View post: 2026 Porsche 911 GT3 Touring For Sale, Currently At $277k On BaT, 6-Speed Manual. Boxer engines feature flat, opposing pistons that move in opposite directions for smooth operation. Subaru ...