Restrictions in the exhaust system robs horsepower and torque especially on turbocharged cars. Thus, removing as much exhaust flow restrictions will increase horsepower and torque. The factory resonators found in the factory midpipe is designed to muffle and quiet the exhaust flow however this causes a restriction to the exhaust flow. Evolution Racewerks' Competition Series Midpipes deletes the resonators from the exhaust system to improve exhaust flow. Coupled with mandrel bent tubing which also helps promote better flow, increase horsepower and torque can be had. At the same time, a more aggressive exhaust sound is produced.
