The plastic cover of a Subaru Boxer engine showing the Subaru constellation logo - Topuria Design/Shutterstock Flat engines are horizontally-opposed piston engines, and this group includes Boxer ...

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 ...