Aftermarket exhaust parts and the engine. However, the pipes do "ring" with the exhaust pulses and increase underhood noise. Headers can be ceramic coated to reduce the heat radiated in the engine compartment, and to increase the temperature of the pipes which increases the velocity of the exhaust gases. Terminology: Catalytic converters are necessary to reduce emissions but create back pressure due to the exhaust gases being forced through a catalyst, and therefore decrease high-end engine power. Many modern catalytic converters only produce 1-3 psi of back pressure, though this restriction worsens further with use. Hi-flow catalytic converters can replace the standard units
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