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In our testing of other timing belts
Our X Pipe is designed to increase low end torque and maximize power throughout the entire RPM band
Requires valve spring upgrade
For the OEM 2-port intake manifold
For up to 9000rpm and 40psi boost Kelford Cams recommend valve spring KVS63-BTK-X
Akrapovič Sound Kit for BMW M4 14-20 (F82/F83) F11 In our testing of otherThe optional Akrapovi Sound Kit enables owners of selected Akrapovi car exhausts to control the sound of the system from the cockpit of their machine. Using Akrapovi technology, drivers can easily switch between the quiet mode and a sportier sound. With the use of a receiver to drive the actuators that open or close the valves at the end of the exhaust system, drivers can use the Sound Remote Controller or the new smartphone app (for iOS and Android)
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