Dinan Free Flow Axle-Back Exhaust for 2011-2016 BMW 550i F10 - D660-0036-BLK

Bring out more of the V8 character in your 2011-2016 BMW F10 550i or 550i xDrive with the Dinan D660-0036-BLK Free Flow Axle-Back Exhaust. Built from T304 stainless steel and finished with four 3.5-inch black ceramic coated, laser-engraved tips, this system is designed to reduce exhaust backpressure while adding a stronger, more purposeful exhaust tone. A vacuum-controlled butterfly valve helps balance freer flow at wide-open throttle with more restrained operation during everyday cruising. Dinan lists a gain of up to 10 HP when the exhaust is paired with applicable engine software.

Rather than chasing volume alone, Dinan engineered the F10 550i system around a combination of flow, sound quality, and cabin comfort. Drone-abatement measures help limit unwanted resonance during highway and low-load driving, while throttle application brings out a fuller V8 note. The stainless steel construction uses the factory brackets and hangers for a clean installation, and the black ceramic quad tips add a more aggressive visual finish to the rear of the car.

Key Features & Specs:

• Brand: Dinan
• Series: Free Flow
• Product Type: Axle-Back Exhaust
• Part Number: D660-0036-BLK
• Fitment: BMW 550i / 550i xDrive
• Chassis: F10
• Material: T304 Stainless Steel
• Body Material: T304 Stainless Steel
• Pipe Material: T304 Stainless Steel
• System Finish: Brushed
• Tip Finish: Black Ceramic Coated
• Exhaust Tip Quantity: 4
• Tip Diameter: 3.5 in
• Tip Branding: Laser-Engraved Dinan Logo
• Maximum HP Gain: +10 HP with applicable engine software
• Valve Type: Vacuum-Controlled Butterfly Valve
• Valve Function: Supports increased flow at wide-open throttle while maintaining quieter operation during normal driving
• Sound: Fuller, more aggressive V8 exhaust tone under acceleration
• Drone Control: Engineered to reduce unwanted cabin resonance
• Installation: Uses factory brackets and hangers
• Clamps Included: Yes
• Hangers Included: Yes
• Labor Time: 1.6 hours
• Length: 54 in
• Width: 29 in
• Height: 10 in
• Weight: 78 lb
• Grade Type: Performance
• Dinan Point Value: 3
• Emission Code: 5
• UPC: 813725021652

Fitment:

• 2011-2016 BMW 550i - F10
• 2011-2016 BMW 550i xDrive - F10