Competition Series 4" Catless Downpipe for the 2011-16 528i N20 (4 Cylinder) Engine crossover With a thicker core

With a thicker core

Charge Pipe features beaded ends and high quality smooth band hose clamps to prevent intercooler piping from coming off from boost

Optional Goodridge Nylon Braided Oil Lines - Upon request

Our testing have shown significant increases in efficiency and performance running a "sequential" configuration

Since our Dual SMIC intercooler upgrade replaces just the factory dual intercoolers

Competition Series 4" Catless Downpipe for the 2011-16 528i N20 (4 Cylinder) Engine crossover With a thicker coreIntroducing our Competition Series 4" Downpipes for the 2011 16 528i N20 (4 Cylinder) Engine. Key Features: Made in the USA! Manufactured in house. Now available for the 2011 16 BMW 528i N20 Engines! Horsepower gains of 14 to 16whp average (gains will vary based on modifications of your vehicle). Higher Max Horsepower Power Curve Torque gains of 16wtq average (stock boost) up to over 24 wtq (Software upgrade) (gains will vary based on modifications of