Here's how Mazda decided to rid their car of pesky turbo lag. The Mazda CX-9 is powered by a 2.5L inline four-cylinder turbocharged engine producing 250 HP and 310 lb-ft of torque. And while turbo-lag is acceptable for many, Mazda was determined to minimize its effects. The SkyActiv engine uses a technology they’re calling “Dynamic Pressure Turbo” which uses a 4-3-1 exhaust and a set of valves that change exhaust airflow depending on the RPM. Along with a short exhaust manifold, valves to increa