Dinan's Free Flow Axle-Back exhaust system features 100 Percent stainless steel construction measured to exact specifications to ensure proper fit via factory hangers and mounting points. Dyno tuned for maximum exhaust flow with minimum backpressure, this system is designed to provide a more aggressive sound under acceleration while reducing drone inside the vehicle, thanks to Dinan's exclusive Helmholtz Chamber and Butterfly Valve technologies.

The exhaust gasses exit through larger laser engraved ultra durable polished, or ceramic black, quad tips.

Every Dinan product comes with our industry-exclusive factory matching new car bumper to bumper warranty and is designed and tested in Morgan Hill, California and can be purchased and installed at any Dinan Approved BMW dealership nationwide.

Features and Benefits

• More Power: +8 HP
• Helmholtz chamber and butterfly valve technology incorporated to remove drone
• Straight through canister design
• Enjoyably louder, throatier and deep sound
• Quad 3.5 Inch black ceramic coated, or polished stainless, laser engraved exhaust tips
• 100 Percent 304 stainless steel construction
• Uses the factory brackets and hangers for a factory-like fitment

Details:

• Dinan Point Value: 3
• Material: T304 Stainless Steel
• Max HP Gain: 8
• Grade Type: Performance
• Finish: Brushed
• Tip Finish: Black Ceramic Coated
• Body Material: T304 Stainless Steel
• Pipe Material: T304 Stainless Steel
• Clamps Included: Yes
• Exhaust Tip Quantity: 4
• Hangers Included: Yes
• Exhaust Type: Axle-Back