The Mazda RX-7 Speedometer Cable provides accurate and real-time speed, which requires the connection of the gearbox to the dashboard indicator, a simple but essential affair that ensures drivers are informed and safe even on the next turn. Constructed around an extremely tightly wound core of steel with a hard outer covering, the cable is wound to turn in perfect time with the output of the transmission and propels a magnet that causes the gauge needle to move continuously rather than with the spasmodic motion produced by cheaper components. Its reputation for long service life is exalted by its owners, who mention that the original specification provided by Mazda is flexible and strong, avoiding kinking and fraying even when the sporty chassis is pushed to the limit. It is compatible with first, second, and third generation RX-7 models, and Mazda even had cable-driven variants of the cruise control that have an ingenious two-wire design whereby one wire serves the gauge and the other the control module without signal loss, a design that highlights its considered engineering. Correct data on vehicle speed also enables the driver to remain within the law and at the same time allows the rotary engine to work at its maximum effective rev range to save fuel and ensure less wear and tear. In cases where the old Speedometer Cable rattles or sticks, changing it to the right length will immediately return the response time to normal and avoid the dangerous period where the needle can drop to zero. In contrast to later electronic sensors, this mechanical connection provides classic enthusiasts with tactile assurance and can be examined in a driveway by looking for broken housings or grease drying out. Because both ends have precision machined square fittings, installation is a pleasure with no guesswork involved, and the Speedometer Cable can make a wonderful addition for the Mazda faithful part of the performance market, giving every RX-7 enthusiast of the old model a feeling of security.
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