Dinan D660-0055 - Freeflow Axle-Back Exhaust

Dinan - D660-0055

Dinan Free Flow Axle-Back Exhaust - 2016-2020 BMW 340i/440i

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

Dinan engineers designed the F30 340i and F32 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 the 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 ceramic black exhaust tips for a tasteful high-performance look. The 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
• The Exhaust Adds 3 Point Towards Badge
• Factory Computer-Controlled Exhaust Valve Is Eliminated
• The Design Features Tips For Tasteful / High-Performance Look
• Enjoyably Louder / Sportier Sound