quick view Add to Cart Evolution Racewerks Competition Series Mid Pipes F97/F98 X3M & X4M S58 Engine - BM-EXH025MIDH MSRP: US$1,314.50 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... Add to Cart Add to Wish List Add to My Wish List Create New Wish List