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
Exhaust heat recovery system US highway cycle, the Rankine cycle system regenerated three times as much energy as the vehicle’s regenerative braking system. A French company, Exoès is specialized in designing and manufacturing exhaust heat recovery systems based on Rankine Cycles. The system EVE, Energy Via Exhaust, leads to fuel savings from 5 up to 15%. Barber-Nichols Inc. develops Rankine technologies for vehicles. The German consortium unites the majority of internal combustion engine manufacturers across the world. Two task forces are currently studying exhaust heat recovery systems on passenger cars. Renault Trucks: As a part of the All For Fuel Eco Initiative, Renault Trucks