Dinan 15-20 BMW M3/M4 (F80/F82/F83) Free Flow Axleback Exhaust System - Polished Tips

$2,349.95 $2,643.95

Dinan's Free Flow axle-back exhaust system features 100% stainless steel construction measured to exact specifications to ensure proper fit via factory hangers and mounting points. Dyno tuned for maximum exhaust flow with minimum backpressure, this system is designed to provide a more aggressive sound under acceleration, while reducing drone inside the vehicle, thanks to computer-controlled valves that limit noise during low-speed driving and open fully during high-load conditions to allow free flow. The exhaust gasses exit through larger laser engraved polished, or ceramic black, quad tips.

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