Sports Series 4" High Flow Catted Downpipe for the 2011-16 528i N20 (4 Cylinder) Engine Finish:Brush Finish 5" afterwards

5" afterwards

Turbulence in turn

With years of experience building race cars and high power street cars

Smooth transition through the exhaust system

Throttle body matched 3" piping

Sports Series 4" High Flow Catted Downpipe for the 2011-16 528i N20 (4 Cylinder) Engine Finish:Brush Finish 5" afterwardsIntroducing our Sports Series 4" High Flow 200 Cell Metallic Catted Downpipes for your 2011 16 528i N20 four cylinder turbo engine! Key Features: Made in the USA! Manufactured in house. Now available for the 2011 16 BMW 528i N20 Engines! High Flow 200 cell metallic catalytic converter used. Higher Max Horsepower Power Curve. Higher Initial Torque Curve. Torque curve hits faster and higher and longer. Better throttle response and faster turbo spool up