Dinan Free Flow Axle Back Exhaust | 2017-2020 BMW 440i (D660-0077) Dinan

2017-2020 BMW 440i Stainless Steel Free Flow Axle Back Exhaust by Dinan

Dinan engineers designed the F33/F36 440i 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. Not only is the tone improved but the

additional burbles and pops that come with it are simply intoxicating. Dinan also incorporates a

Helmholtz chamber design that reduces resonance or”drone” at low RPM.

The system is built to exacting specifications to ensure perfect fit using the factory

hangers. It is made from 100% 16 gauge 304 stainless steel and will resist corrosion for years to come.

The design features twin 89mm (3.5″) polished or cermic black exhaust tips for a tasteful high-

performance look.

Features

• Helmholtz chamber to reduce drone
• Twin 89mm (3.5″) laser engraved, polished or ceramic black exhaust tips
• 100% 304 stainless steel construction

Benefits

• More Power: + 6 HP @ 6600 RPM, + 5 LB-FT @ 6600 RPM
• Enjoyably louder, sportier sound
• Uses the factory brackets and hangers for a factory-like fitment

Applications

• 2017-2020 BMW 440i

What’s In The Box?

• 1 – Free Flow Axle Back Exhaust

References

• Installation

  Instructions

Warranty

• Manufacturer Standard Warranty