Dinan engineers designed the BMW 328i/428i exhaust to improve exhaust flow by reducing back pressure, resulting in increased power output and a great sporty sound that is civilized when you want it to be, and pleasantly aggressive under hard acceleration. Like all Dinan exhausts, our 328i/428i Free Flow Exhaust is engineered to reduce low-RPM drone so the cabin of the vehicle is still intimate and not drowned in an excessively loud tone. The system is built with ease in mind and utilizes a simple bolt-on installation with included mounting hardware. It is made from 100% 16 gauge 304 stainless steel and will resist corrosion for years to come. The design features twin 70 mm ceramic black or polished and laser engraved exhaust tips for a tasteful, high-performance look that yields a maximum performance gain of 4 horsepower and 3 ft-lbs of torque.
Fits; BMW; 3 Series, 4 Series; 328i, 428i; Coupe, Sedan, Convertible; F30, F31, F32, F33; 2012-2014 328i and xDrive F30, 2014-2015 328i xDrive F31, 2014-2015 428i and xDrive F32, 2014-2015 428i and xDrive Convertible F33