The Dinan D660-0098-BLK Valved Axle-Back Exhaust system brings true M-inspired performance and acoustics to the G42 M240i. Featuring quad 4 in. black ceramic tips, TIG-welded 304 stainless steel construction, and dual 76mm electronically controlled valves, the system delivers freer flow and a more aggressive tone when open—while remaining refined and quiet at lower throttle with the valves closed. The larger 76mm piping replaces the factory's 70mm diameter for improved flow and reduced backpressure. Drone abatement design inside the muffler preserves interior comfort, making it an ideal street-performance upgrade. This fully bolt-on system reuses the factory valve actuator and adds a second valve to achieve balanced sound and function across all four tips.

Dinan D660-0098-BLK Valved Axle-Back Exhaust Features:

• +6 HP and +5 lb-ft torque gains at 6600 RPM
• Quad 4 in. clamp-on double-wall black ceramic exhaust tips
• 100% 304 stainless steel TIG-welded construction
• 76mm tubing replaces stock 70mm for improved exhaust flow
• 4 lb weight reduction vs. stock exhaust system
• Dual 76mm electronically actuated valves for symmetrical flow
• OEM valve actuator reused; second actuator added
• Maintains computer-controlled exhaust valve behavior
• Designed for enhanced tone without excessive drone
• Factory-like fitment with included mounting hardware

Emissions Note:

This part is legal for sale or uses on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

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