Dinan Free Flow Axle-Back Exhaust System with Polished Tips for BMW M3 / M4 (F8x) 2015-2020

The F8x M3/M4 offers an exhilarating sound straight from the factory, but with a Dinan Free Flow Axle-Back Exhaust system, it transforms into a symphony of power and refinement that will impress even the most discerning ear.

This system is made from 100% 304 stainless steel and is precisely engineered to ensure a perfect fit using the factory hangers and mounting points. Dyno-tuned to provide maximum exhaust flow with minimal backpressure, it offers a more aggressive sound during acceleration, while advanced drone abatement technologies reduce cabin resonance at low speeds. The system features computer-controlled valves that stay quiet during everyday driving but fully open under high-load conditions for free flow and optimal sound.

Key Features:

• Power Gains: +5 HP
• Drone Abatement Technologies: Reduces cabin resonance for a refined sound
• Sound Profile: Enjoyably louder and sportier, with an aggressive tone under hard acceleration
• Exhaust Tips: Quad 3.5" laser engraved tips available in polished stainless steel or black ceramic-coated finish
• Computer-Controlled Valves: Adjust the sound via the M-Drive settings, reusing stock exhaust valve actuators for seamless operation
• Secondary Exhaust Valves: Twin 76mm valves are 45% less restrictive than the OE, enhancing flow and performance
• Weight Reduction: Dinan exhaust is 3 lbs lighter than the stock system
• Construction: 100% 304 stainless steel for long-lasting durability and corrosion resistance
• Fitment: Uses factory brackets and hangers for a factory-like installation

Dinan's Free Flow Axle-Back Exhaust is backed by their industry-exclusive factory-matching new car bumper-to-bumper warranty and designed and tested in Morgan Hill, California. Available for purchase and installation at any Dinan Approved BMW dealership nationwide, this system perfectly embodies Dinan’s philosophy of "Performance Without Sacrifice."