Flat engines like Subaru’s Boxer are nothing new. The design, which gives the finger to inline and V-type engines and instead incorporates horizontally opposed banks of pistons, was patented in 1896 ...

To squeeze some additional horsepower from the boxer engine in my Scion FR-S, I knew an exhaust manifold was in order. So far power mods for the 4U-GSE have included an HKS intake, Tomei straight pipe ...

Bolted directly to the engine block, the exhaust manifold is the first section of a vehicle’s exhaust system. It funnels exhaust gases from all the cylinders and routes them to the car’s catalytic ...