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 ordrone at low RPM.

The system is built to exacting specifications to ensure the perfect fit using the factory hangers. It is made from 100 Percent 16-gauge 304 stainless steel and will resist corrosion for years to come.

The design features twin 89mm (3.5 Inch) polished or ceramic black exhaust tips for a tasteful high-performance look.

The factory computer-controlled exhaust valve is eliminated.

Features and Benefits

• More Power: +В 6 HP at 6600 RPM, + 5 Lb-ft at 6600 RPM
• Helmholtz chamber to reduce drone
• Enjoyably louder, sportier sound
• Twin 89mm (3.5 Inch) laser engraved, polished or ceramic blackВ 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: 6 at 6600 RPM
• Max Torque (lb-ft) Gain: 5 at 6600 RPM
• Grade Type: Performance
• Finish: Brushed
• Body Material: T304 Stainless Steel
• Pipe Material: T304 Stainless Steel
• Clamps Included: Yes
• Exhaust Tip Quantity: 4
• Hangers Included: Yes
• Exhaust Type: Axle-Back