Dinan D660-0078-BLK Free Flow Axle-Back Exhaust for BMW 540i

The Dinan Free Flow Axle-Back Exhaust transforms your 2017-2023 BMW 540i with an aggressive, sporty exhaust note while delivering measurable performance gains. Engineered specifically for the G30 540i, this premium exhaust system enhances both sound and power output.

Performance Benefits:

• Adds 6 horsepower at 6600 RPM and 5 lb-ft of torque at 6600 RPM
• Eliminates factory computer-controlled valve for maximum flow and unrestricted sound at all times
• Integrated Helmholtz resonance chamber significantly reduces cabin drone for comfortable highway cruising
• Noticeably louder, more aggressive exhaust tone that emphasizes the turbocharged inline-six engine character

Premium Construction:

• 100% 304 stainless steel construction throughout ensures long-lasting durability and corrosion resistance
• Two massive quadrilateral black ceramic-coated exhaust tips with laser-engraved Dinan logo
• Direct bolt-on installation using factory mounting brackets and hangers for OEM-quality fitment
• No cutting or welding required—complete axle-back replacement system

This exhaust system delivers the perfect balance of performance enhancement, refined sound quality, and visual impact. Dinan's engineering eliminates the restrictive factory exhaust valve system, allowing your 540i's turbocharged B58 engine to breathe freely while maintaining civility during daily driving.