Dinan Free Flow Axle-Back Exhaust - BMW M340i / M440i (G20/G22) 2020-2026 - Black Tips

Dinan SKU: DNND660-0085-BLK
Price
Regular price $2,158.95
Regular price $2,699.95 Sale price $2,158.95
20% OFF
In Stock – Ready to Ship
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The Dinan Free Flow Axle-Back Exhaust is built entirely from TIG-welded, brushed T304 stainless steel and runs larger 76mm tubing versus the 70mm stock piping for freer flow. A dual-valve design adds a second 76mm computer-controlled valve so gas flows evenly regardless of valve position, with valves roughly 30% less restrictive than the OE units that open under load for an aggressive, near straight-pipe tone and close at low speed for a civil cabin. Quad 4in double-walled, black ceramic-coated, laser-engraved tips finish the system. Dinan rates gains of +6 HP and +5 lb-ft at 6600 RPM, and the system is about 4 lbs lighter than stock. Installation is bolt-on with the included mounting hardware.

Specifications

Type Free Flow axle-back exhaust (dual-valve)
Material T304 stainless steel, TIG welded, brushed
Tips Quad 4in double-walled, laser-engraved
Finish Black ceramic-coated tips
Valves Dual 76mm computer-controlled (30% less restrictive than OE)
Piping Diameter 76mm (vs 70mm stock)
Power Gain +6 HP & +5 lb-ft @ 6600 RPM
Part Number D660-0085-BLK

Documents: Installation Instructions (PDF)

This part fits:

Year Make Model Submodel
2020-2026 BMW M340i Base
2020-2026 BMW M340i xDrive Base
2021-2026 BMW M440i Base
2022-2024 BMW M440i Gran Coupe Base
2021-2024 BMW M440i xDrive Base
2022-2024 BMW M440i xDrive Gran Coupe Base

Shipping

  • Orders placed before 3 PM ET typically ship the same business day. Larger items ship within 1 to 3 business days.
  • Standard, expedited, and overnight options at checkout.
  • Oversized items ship by freight and take longer.
  • Special order items follow a lead time we confirm with you individually before the order is committed.
  • Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
  • Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
  • 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 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
  • Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
  • Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
  • Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
  • Product images may be representative. The SKU and specifications in the listing are what ships.
  • Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Returns & Refunds · Warranty

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