Dinan D660-0077 - Freeflow Axle-Back Exhaust

Dinan - D660-0077

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

Freeflow Axle-Back Exhaust; 304 Stainless Steel Construction; 6 Max Horsepower Gain At 6600 RPM; 5 lbs.-ft. Max Torque Gain; Twin 89 mm. / 3.5 in. Laser Engraved Polished Tips;

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. Factory computer controlled exhaust valve is eliminated.

• Improves Exhaust Flow By Reducing Back Pressure
• Increases Power Output And Provides Great Sporty Sound
• System Ensures Perfect Fit Using The Factory Hangers
• The System Will Resist Corrosion For Years To Come
• Uses The Factory Brackets And Hangers For Factory-Like Fitment
• Helmholtz Chamber To Reduce Resonance Or Drone At Low RPM
• Enjoyably Louder / Sportier Sound
• Factory Computer-Controlled Exhaust Valve Is Eliminated
• The Design Features Tips For Tasteful / High-Performance Look