Mazda RX-8 Intake Manifold feeds the air charge to the engine as a smooth, cool charge to every rotary chamber, allowing the engine to breathe freely to provide reliable power and aggressive throttle response. It directs filtered throttle body air into two runner paths divided mathematically to ensure that all rotors get the same dense mix, which translates to owners in the form of smooth idle, sharp revs and surprisingly good mileage. The subsequent generations of the RX-8 ended with a variable length Intake Manifold which deactivates its long runners and switches to short runners at higher RPM in order to lift low-end torque and then flood chambers at top-end surge without increasing bulk. Fitted to early 2004 coupes or final 2012-produced cars, the unit simply bolts in place, allowing enthusiasts to use the same proven architecture across all the trim levels, with factory emissions protection and fault codes intact so that at all loads the engine control computer ensures the engine is operating at safe fuel ratios. As is common to Mazda engineering, the two-piece shell incorporates heavyweight gaskets that do not allow leaks to occur; internal seals are not at risk of detonation. Composite versions cool down fast, and that was what Mazda tried to achieve to reduce intake temperatures and reduce the risk of knock, thus allowing the rotary to remain healthy even in spirited weekend drives. Coolant, pressure and air temperature sensors have incorporated bosses that enable real-time airflow adjustment and therefore the computer can proceed to adjust timing to be more aggressive for punch or move back during hot summer traffic to prevent accidents. It is this focus on airflow dynamics that has earned the Intake Manifold a reputation for reliability equal to its performance improvements and made it one of the bright stars of the sports car world. Being a factory-tuned unit that is purpose-built to fit in the RX-8 platform, the Mazda part is silently efficient, powerful and long-term durable in one smart package.
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