Dinan dnnD660-0098 Valved Axle-Back Exhaust System with Polished Tips for 2022-2026 BMW M240i/M240i xDrive (G42)

The use of quad tips also presented some additional challenges and fostered some innovation to the already visually impressive system constructed entirely of TIG welded and brushed T304 stainless steel. Confined to dual tips, the factory system utilizes only one exhaust valve and functions by eliminating the passenger side tip when the valve is closed, siphoning all gases through the muffler and out the driver's side tip for quieter operation. With the introduction of more pipes/tips, this methodology was not practical, or desired. In true Dinan M exhaust fashion, our talented engineering team decided that integrating a second valve to the system would garner the most favorable results in both symmetry and overall sound. The result is a system that incorporates larger 76mm tubing (vs 70mm stock) and allows freer flow through the entirety of the system but specifically to both outer pipes when the enlarged valves are open. The resulting flow and sound mimics an awe-inspiring straight pipe solution with a deeper and meatier tone, a defining element of all Dinan exhausts. In contradiction to the aggressiveness resulting from open valves, when the valves are closed, all gases are forced into the muffler for sound deadening and exit the two inner tips. Regardless of valve position, the intimate nature of the interior is retained so conversation can continue without an excessively loud drone courtesy of numerous drone abatement technologies in the can. With the Dinan exhaust equipped on the M240i you get the best of both worlds; aggressive tone/sound and civility. A combination that is paramount to any M exhaust, and now by virtue of tip count, the M240i as well. Welcome to the illustrious family. Stainless Steel - Polished Tips - G42

• Stock exhaust valve actuator reused, and another valve/actuator added to the opposing side promoting even flow regardless of valve position
• Computer controlled exhaust valves are retained and limit noise during low speed driving and open fully during high-load conditions
• Twin exhaust valves are a whopping 76mm diameter, making them 30% less restrictive than the OE valves
• Quad 4" diameter clamp-on, double-walled, polished and laser engraved exhaust tips
• Larger diameter piping for increased flow (76mm vs 70mm)
• More Power: + 6 HP @ 6600 RPM, + 5 LB-FT @ 6600 RPM
• Factory-like fitment with included mounting hardware
• 4 pounds lighter than the stock system
• 100% 304 stainless steel construction
• Enjoyably louder, sportier sound

The Dinan dnnD660-0098 valved axle-back exhaust system is designed for the 2022-2026 BMW M240i and M240i xDrive (G42). Constructed entirely from TIG-welded and brushed T304 stainless steel, the system combines a deeper, sportier exhaust tone with valve-controlled sound management for a balance of performance and everyday civility.

The system uses the stock exhaust valve actuator and adds a second valve and actuator to the opposing side to promote even flow. When the valves are open, larger 76mm tubing and freer-flowing exhaust paths produce an aggressive tone. When closed, exhaust gases are routed through the muffler and exit through the two inner tips for quieter operation. Drone-abatement technologies help maintain a comfortable interior environment.

Key Features & Performance Benefits

• Valved exhaust control: Computer-controlled valves limit noise during low-speed driving and open fully under high-load conditions.
• Increased exhaust flow: Larger 76mm piping and valves provide a less restrictive path than the original equipment components.
• Performance improvement: Manufacturer-stated gains of 6 HP and 5 lb-ft of torque at 6,600 RPM.
• Sport-oriented sound: Produces an enjoyably louder, deeper, and meatier exhaust tone while retaining interior civility.

Key Product Specifications & Technical Data

• Brand: Dinan
• Part number: dnnD660-0098
• Application: BMW M240i/M240i xDrive (G42)
• System type: Valved axle-back exhaust
• Material: 304 stainless steel
• Exhaust tubing diameter: 76mm
• Exhaust tips: Quad 4-inch clamp-on, double-walled, polished and laser engraved
• Weight: 4 pounds lighter than the stock system

What's Included

The system includes the valved axle-back exhaust components and mounting hardware. The stock exhaust valve actuator is reused, with an additional valve and actuator added to the opposing side.

Fitment

Fits 2022-2026 BMW M240i and BMW M240i xDrive models listed for the G42 platform, including the 2022 BMW M240i xDrive; 2023-2026 BMW M240i; and 2023-2026 BMW M240i xDrive.

Fitments:
2022 BMW M240i xDrive Base
2023 BMW M240i Base
2023 BMW M240i xDrive Base
2024 BMW M240i Base
2024 BMW M240i xDrive Base
2025 BMW M240i Base
2025 BMW M240i xDrive Base
2026 BMW M240i Base
2026 BMW M240i xDrive Base

Air Freight Prohibited: false
Not Carb Approved: false
Carb Acknowledgement Required: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Units Per Sku: 1
Regular Stock: t