The spinner will rotate in the exhaust stream. At high engine speeds the spring-loaded spinner is also pushed out of the exhaust tip, giving a visual indication of the revving engine. For a variety of cars with electronic fuel injection engine control, the SPINNER EXHAUST TIP has the beneficial effect to eliminate the initial hesitation of the engine under rapid acceleration.
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1 comment:
By "reduces hesitation" they mean "increases backpressure", which would cause a reduction in engine performance at higher RPM just like a restrictive muffler. In general gee-gahs like this impair performance, not improve it.
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