The Audi S4 Camshaft allows the engine to have precise control of the rate of rush in of air and release of exhaust, ensuring that drivers experience a sense of quick power without compromising smoothness. The rotating speed of the Camshaft ensures that each piston stroke is timed to the letter, which means that the valves never collide and combustion remains consistent at idle up to redline. Previous models of the sporty S4 had only a single overhead design, with later models switching to twin shafts for the intake and exhaust systems, a change that reduced moving mass and opened up more revs. The next addition was variable valve timing, which provided the power to turn the Camshaft a few degrees on the fly, which increased the low-end torque in city traffic and the high RPM pull in highway passes. The intelligent hardware is compatible with all turbo, supercharged, or naturally aspirated versions of the lineage and, as such, the owners of B5, B6, B8, or the existing B9 models can count on the same core principles of reliability and thus will get the punch that enthusiasts will demand. The wear is resisted by high-strength steel, hardened lobes, and precision-cut journals, and this results in the part remaining dimensional even after many spirited miles, giving Audi fans confidence. Since the component is so precise in metering air, all Audi powerplants have cleaner combustion, engines burn more of their fuel, cutting emissions and increasing fuel economy, which is a nice complement to the Quattro all-wheel-drive traction to make the powerplant safer. The Camshaft also accommodates the modern-day knock sensors and ECU strategies whereby it provides the control unit with predictable valve events, instant adjustments when the road or weather conditions vary, and it is positioned at the center of the expanded Audi performance family that ensures the Audi badge maintains its long-lasting performance in the competitive sports sedan market.
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