Dinan Free Flow Axle-Back Exhaust Suite for BMW M3 (G80)/M4 (G82) | D660-0050

The Dinan Free Flow Axle-Back Exhaust Suite (D660-0050/D660-0050-BLK) is the definitive acoustic upgrade for the BMW M3 (G80) and M4 (G82), transforming the factory sound into a symphony of aural delight. Dyno-tuned for maximum exhaust flow with minimum backpressure, this system delivers a verified power increase of +5HP and features advanced technology to eliminate drone inside the vehicle. The core of this system is its twin secondary 76mm exhaust valves, which are an astounding 45% less restrictive than the original equipment.

Features:

• Verifiable Power Gains: Delivers an increase of +5HP.

• Advanced Valve Technology: Features computer-controlled valves that reuse stock actuators, limiting noise during low-speed driving and opening fully during high-load conditions to allow free flow. Valve operation remains adjustable via the M-Drive settings.

• Flow Optimization: Twin 76mm secondary exhaust valves are 45% less restrictive than OE, maximizing exhaust flow.

• Acoustic Precision: Utilizes drone abatement technologies to significantly reduce cabin resonance while providing an aggressively louder, sportier sound when desired.

• Structural Integrity: Built from 100% 304 stainless steel construction and is a full 3lbs lighter than the stock exhaust system.

• Aesthetic Excellence: Finishes with quad 3.5" laser engraved tips, available in polished stainless or black ceramic coated finishes.

• Fitment Integrity: Designed to use the factory brackets and hangers for a guaranteed, factory-like fitment.

Product contains:

• (1) Dinan Axle-Back Muffler Assembly

• (4) Quad 3.5" Exhaust Tips (Black Ceramic Coated or Polished Stainless)

• (1) Complete Installation Hardware Kit

Warranty This product comes with Dinan's industry-exclusive factory matching new car bumper to bumper warranty. Note: Manufacturer warranty terms are subject to change.

Installation Instructions