Dinan 23-26 BMW M240i/M240i xDrive (G42) Valved Axleback Exhaust System - Polished Tips

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

Upgrade the sound, flow, and appearance of your G42 BMW M240i with the Dinan D660-0098 valved axle-back exhaust system. Engineered from TIG-welded, brushed T304 stainless steel, this system replaces the restrictive factory axle-back design with larger tubing, twin exhaust valves, and quad polished tips. It delivers a deeper, meatier exhaust tone while maintaining the refined driving character expected from a premium BMW performance vehicle. The system is designed for 2022-2026 BMW M240i and M240i xDrive models.
The Dinan exhaust retains the factory exhaust valve actuator and adds a second valve to the opposing side for balanced flow and improved symmetry. Computer-controlled valves remain functional, helping reduce noise during low-speed driving while opening under high-load conditions for a more aggressive sound. When the valves are open, freer-flowing outer passages create a dramatic, straight-pipe-inspired character. When closed, exhaust gases are routed through the muffler and exit through the inner tips for a quieter, more civil driving experience. Integrated drone-abatement technology helps preserve comfortable cabin conversation during extended drives.
Feature: 100% T304 stainless steel construction for durability and corrosion resistance. Feature: Larger 76mm tubing compared with the 70mm factory piping for improved exhaust flow. Feature: Twin 76mm exhaust valves designed to reduce restriction compared with the original equipment valves. Feature: Quad 4-inch clamp-on, double-walled, polished and laser-engraved exhaust tips. Feature: Computer-controlled valve operation retained for adaptable sound levels. Feature: Factory-like fitment with included mounting hardware. Feature: Approximately 6 horsepower and 5 lb-ft of torque gained at 6,600 RPM. Feature: Approximately 4 pounds lighter than the factory system. Feature: Sportier, louder exhaust sound without excessive interior drone.

Features:

• Stock exhaust valve actuator reused with a second valve and actuator added for balanced exhaust flow

• Computer-controlled valves retain quiet operation at low speeds and open during high-load conditions

• Twin 76mm exhaust valves provide reduced restriction compared with the factory valves

• Quad polished, double-walled, clamp-on exhaust tips with laser-engraved Dinan branding

• Larger 76mm exhaust piping improves flow over the factory 70mm piping

• Delivers approximately 6 horsepower and 5 lb-ft of torque at 6,600 RPM

• Factory-like fitment with included mounting hardware

• Approximately 4 pounds lighter than the factory exhaust system

• Constructed entirely from T304 stainless steel

• Produces a louder, deeper, and sportier exhaust tone

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