![Dinan Free Flow Axle-Back Exhaust | F30 · F31 · F34 328i · F32 · F33 · F36 428i | 2.0L Turbo I4 [N20] Color:Black 4 Nutserts](https://cdn.shopify.com/s/files/1/0635/0032/1015/files/DinanFreeFlowAxle-BackExhaustF30_F31_F34328i_F32_F33_F36428i2.0LTurboI4_N20.png?v=1740331438)
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4 Nutserts
The back pressure is significantly reduced
the R1 is designed to be the last DV upgrade the engine will ever need
this design has been a constant source of complete timing failure and one of the weakest links on the 1
Dinan Free Flow Axle-Back Exhaust | F30 · F31 · F34 328i · F32 · F33 · F36 428i | 2.0L Turbo I4 [N20] Color:Black 4 NutsertsDinan 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 Axle Back 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
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