The Dinan Valved Axle-Back Exhaust for the G42 BMW M240i is built entirely from TIG-welded, brushed T304 stainless steel with a quad-tip layout. Where the factory system uses a single valve and drops one tip when closed, Dinan adds a second valve so flow stays symmetric in every position. Larger 76mm tubing replaces the stock 70mm to free up flow, and the twin 76mm valves are roughly 30% less restrictive than the OE valves. Closed valves route gas into the muffler and out the inner tips for quiet cruising, while open valves feed both outer pipes for a deeper, near straight-pipe tone. Drone abatement technologies keep the cabin civil, the system runs 4 pounds lighter than stock, and peak gains reach +6 HP and +5 lb-ft at 6600 RPM.
Specifications
| Type | Valved axle-back exhaust (twin-valve, quad tip) |
| Position | Rear (axle-back section) |
| Material | 100% T304 stainless steel, TIG-welded, brushed |
| Tubing Diameter | 76mm (vs 70mm stock) |
| Valves | Twin 76mm, ~30% less restrictive than OE |
| Tips | Quad 4in double-walled clamp-on, laser-engraved Dinan logo |
| Tip Finish | Black ceramic coated |
| Power Gain | +6 HP / +5 lb-ft @ 6600 RPM |
| Weight Savings | 4 lb lighter than stock |
| Part Number | D660-0098-BLK |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2023-2026 | BMW | M240i | Base |
| 2022-2026 | BMW | M240i xDrive | 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
