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DINAN FREE FLOW AXLE-BACK EXHAUST - 2015-2020 BMW M3/M4 D660-0050
Features:
- More Power: +5 HP
- Drone abatement technologies used to reduce cabin resonance
- Enjoyably louder, sporter sound
- Quad 3.5" black ceramic coated, or polished stainless, laser engraved exhaust tips
- Computer controlled valve limits noise during low speed driving; valve opens fully during high-load conditions to allow free flow
- Stock exhaust valve actuaters are reused
- Operation of exhaust valve is unchanged so exhaust tone can be adjusted via the M-Drive settings.
- Dinan exhaust is 3 lbs lighter than stock
- Twin secondary exhaust valves with a whopping 76mm diameter, making them 45% less restrictive than the OE valves.
- 100% 304 stainless steel construction
- Uses the factory brackets and hangers for a factory-like fitment
 
                                 
                                        