aFe Power 77-16301 BMW 1/2/3/4-Series/Z4/M3/M4-Series Sprint Booster (M/T)
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<b>[Product Information]</b><br>
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<li>Three position settings: factory (off), Sport (green), Race (red)</li>
<li>Reduces throttle response time</li>
<li>Does not affect the vehicle's electronic system</li>
<li>Improved acceleration</li>
<li>Easy to install</li>
</ul>
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