Dinan Free Flow Axle-Back Exhaust - BMW M550i (G30) 2018-2023 - Black Tips

Dinan's Free Flow axle-back exhaust for the G30 M550i reduces back pressure for a gain of 8 horsepower and 6 lb-ft at 6600 RPM while retaining the factory computer controlled valves that stay quiet at low speed and open fully under load. Built from 100% 304 stainless steel, it bolts on with the included hardware and uses drone abatement tuning to keep the cabin calm at cruise before the V8 opens up under throttle. Four 4 inch double-walled clamp-on tips finish the system in laser engraved black ceramic.

Specifications

Documents: Installation Instructions (PDF)

This part fits:

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
• International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

• 30-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy