Dinan Free Flow Axle-Back Exhaust - 2011-2016 BMW 550i

Dinan's Free Flow Axle-Back Exhaust improves 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 harder acceleration with zero drone. 100% stainless steel construction and exacting specifications ensure that the system fits correctly using the factory hangers and will resist corrosion for years to come. A vacuum controlled butterfly valve is utilized to improve flow at wide-open throttle while keeping things civilized and "drone" free throughout. The design reduces overall weight as well and features 3.5'' polished, or ceramic black, tips for a tasteful high-performance look.

• More Power: + 10 HP when coupled with engine software
• Drone abatement technologies used to reduce cabin resonance
• Enjoyably louder, sportier sound
• Quad 3.5" laser engraved, polished or ceramic black exhaust tips
• 100% 304 stainless steel construction
• Uses the factory brackets and hangers for a factory-like fitment

Specifications

• Body Material: T304 Stainless Steel
• Brand: Dinan
• Category: Exhaust
• Clamps Included: Yes
• Dinan Point Value: 3
• Emission Code: 5
• Exhaust Tip Quantity: 4
• Finish: Brushed
• Grade Type: Performance
• Hangers Included: Yes
• Height: 10
• Labor Time (Hours): 1.6
• Length: 54
• Material: T304 Stainless Steel
• Max HP Gain: 10
• Muffler Quantity: N/A
• Pipe Material: T304 Stainless Steel
• Product Type: Axle-Back Exhaust
• Sub Category: Exhaust and Tail Pipes
• Tip Finish: Black Ceramic Coated
• Warning: California Proposition 65
• Weight: 78
• Width: 29

Vehicle application overview

Confirm trim, engine, and installation requirements before ordering.

• 2011–2016 BMW 550i
• 2011–2016 BMW 550i xDrive