Dinan Valved Axle-Back Exhaust with Polished Tips for BMW M240i G42 (2022-2026)

The G42 M240i shares its B58 six with the M340i and M440i, and Dinan's D660-0098 gives it the same quad-tip exhaust treatment. Four 4-inch (102 mm) straight-cut, double-walled polished tips with laser-engraved Dinan logos fill the factory valance. Behind them, T304 stainless tubing grows from 70 mm to 76 mm. Dinan rates the gain at plus 6 horsepower and plus 5 lb-ft at 6600 rpm, and the system is about 4 pounds lighter than stock.

The factory M240i exhaust has one valve and quiets down by shutting off the passenger-side tip. Dinan reuses that actuator and adds a second valve and actuator on the other side, so the car sounds even whichever way the valves are set. Both valves are 76 mm, about 30 percent less restrictive than the originals. Open, gases flow through the outer pipes with a near straight-pipe sound. Closed, everything runs through the muffler and leaves through the two inner tips. Drone-abatement tuning keeps the cabin calm on the highway.

Dinan titles this kit for 2022-2026 BMW M240i. In the U.S., the M240i xDrive Coupe was sold from 2022, and the rear-drive M240i was added for 2023, so the table starts each version in its first U.S. year and ends at 2026. It is TIG welded from brushed T304 stainless, uses factory-style mounting with the included hardware, and Dinan quotes 2.5 hours of labor. It does not fit the four-cylinder 230i, the G87 M2, or the earlier F22 M240i. The black-ceramic-tip version is sold separately as D660-0098-BLK.

Emission code 5 applies, and the kit carries 3 Dinan points. The packaged system ships at 53 x 26 x 12 inches and 74.4 pounds. Dinan's limited warranty covers the remainder of the vehicle factory limited warranty (up to 4 years / 50,000 miles) or 2 years / unlimited miles, whichever is greater. A former DNN-prefixed listing for this part now redirects here.

Features

• Quad 4-inch (102 mm) polished, double-walled, laser-engraved tips
• Plus 6 hp and plus 5 lb-ft at 6600 rpm
• 76 mm stainless tubing versus the factory 70 mm
• Second valve added; twin 76 mm valves about 30% freer than OE
• About 4 lb lighter than stock

What's Included

• Dinan Valved Axle-Back Exhaust, Polished Tips (D660-0098)

Specifications

Questions about fitment? Call (310) 231-0292 or text (310) 886-3111.

Fitment Notes

• For 2022-2026 BMW M240i xDrive Coupe and 2023-2026 M240i rear-drive Coupe (G42).
• Dinan titles the kit 2022-2026 BMW M240i; the rear-drive M240i reached the U.S. for 2023.
• Not for the 230i, the G87 M2, or the F22 M240i. Black-tip sibling: D660-0098-BLK.