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.
| 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: In-stock orders placed before 3 PM EST ship the same day, and everything else ships within 24 hours. Standard, expedited, and overnight options are available at checkout. Backordered items ship as soon as we get them back in stock. Contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
