Aftermarket exhaust parts restrictions in the system—can similarly increase performance, though would likely be illegal in areas where tampering with emissions devices is prohibited, particularly when placed in front of the catalytic converters. Aftermarket exhaust parts Aftermarket exhaust parts are intended to replace the factory fitted exhaust components of a car, motorcycle, or other motor vehicle in order to improve the performance, visual appeal, or sound of the vehicle. Generally, performance enhancements are achieved by reducing the back pressure of the factory exhaust system. Frequently a side effect of a free-flowing exhaust system is either a "different" sound, a higher noise level, or
Vehicle-to-device attention of car users and caused a rise in the number of new apps developed specifically for the car industry. This trend has such a great influence that now manufacturers are beginning to design cars taking care of their interaction with mobile phones. For example, starting from 2017 Volvo is going to sell keyless cars, thanks to an app that makes it possible to open and start the vehicle remotely. Another sector that could coherently benefit from this technology is car sharing. Vehicle-to-device Vehicle-to-device (V2D) communication is a particular type of vehicular communication system that consists in the exchange of