The Mazda RX-8 Throttle Body balances the incoming air with precision akin to a scalpel, which provides the rotary engine with a quick lift-off as well as a predictable burst of power whenever the driver hits the pedal. It is constructed of a stiff aluminum center assembly and a butterfly plate that swivels smoothly, making the vehicle known to be very reliable as the body will not warp and the shaft seals prevent grime from entering the throttle, and therefore sticky throttles are uncommon even in a Mazda that has served many years in spirited driving. The unit fits between the air box and the intake manifold on both production RX-8s, with the car being an early 2004 six-speed and a later Spirit R with an automatic, and it enables direct interchange for all trims and maintains the aspect of true Mazda quality. Two actuation styles provide versatility, including a conventional cable through which drivers can feel a mechanical action, and an electronic drive-by-wire motor that allows traction and stability systems to reduce unnecessary wheelspin to make the Throttle Body flexible and increase safety in situations where roads become wet. An expeditious throttle position sensor is on the side of the unit, which exchanges blade angle information with the PCM, allowing fuel injectors to be adjusted immediately to maintain emissions trim and enabling the RENESIS engine to consume less fuel during cruising. Since flow remains correct at idle and wide open, it means that the spark plugs are not clogged with carbon and the drivetrain remains smooth during load, which improves the long-term reliability that enthusiasts seek. This perfectly weighted Throttle Body in combination with the RX-8 allows corner exits and ensures a progressive rather than a jumpy corner exit, making even daily commutes and track days an exercise in confidence. All this has made the component a masterpiece in the current performance parts market and at the same time retains the essence of Mazda as focused on sharp and engaging motoring.
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