Dinan's Free Flow Axle-Back Exhaust for the M5 provides improved flow and the resulting power gains without the excessive noise associated with typical aftermarket mufflers. The Dinan exhaust features a rigid and durable muffler case, manufactured from 20 gauge-304 stainless steel for optimum resistance to corrosion.

Internally, the systems feature Dinan's Tuned Resonance Chamber Technology, providing the optimum balance between maximum power gains and a civilized, yet sporty exhaust note. The system also reduces weight substantially, weighing in at only 37.6 lbs.

As compared to the stock system at 66 lbs. Dual 3-inch diameter polished stainless tips give the cars a tasteful performance look as well.

Features and Benefits

• More Power: +В 6 HP at 6500 RPM + 5 Lb-ft at 6500 RPM (w/ software)
• Drone abatement technologies used to reduce cabin resonance
• Enjoyably louder, sportier sound
• Dual 3 Inch polished and laser engraved exhaust tips
• Over 28 lbs. lighter than stock (37.6 lbs. vs. 34 lbs.)
• 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 6500 RPM
• Max Torque (lb-ft) Gain: 5 at 6500 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
• Peak HP: 402 at 6500 RPM
• Peak Torque (lb-ft): 375 lb/ft at 4500 RPM
• Exhaust Type: Axle-Back