The Dinan D660-0093-BLK Valved Axle-Back Exhaust transforms the exhaust tone of the G80 M3 and G82/G83 M4 with a deeper, more refined sound while reducing the cabin drone commonly associated with S58-equipped models. TIG-welded from brushed T304 stainless steel and equipped with quad 4.5 in. double-wall black ceramic tips, the system delivers +6 HP and +5 lb-ft gains and shaves 6 lb. off the factory setup. Larger 76mm piping replaces the stock 70mm system to improve flow and response, while stock valve actuators are retained for full M-drive sound mode functionality. When closed, flow is routed through Dinan’s muffler for subdued street manners. When open, it bypasses the muffler for a near straight-pipe sound experience. Ideal for G8x owners seeking both daily drivability and high-performance acoustics.

Dinan D660-0093-BLK Valved Axle-Back Exhaust Features:

• +6 HP and +5 lb-ft torque gains at 6600 RPM
• Quad 4.5 in. double-wall black ceramic clamp-on tips
• 100% 304 stainless steel TIG-welded and brush finished
• 76mm piping replaces 70mm OEM tubing for improved flow
• 6 lb weight reduction vs. stock axle-back (38 lb vs. 44 lb)
• Reuses factory exhaust valve actuators and retains full electronic control
• Drone-abatement technologies preserve cabin refinement
• Muffler routing when valves are closed, bypass under high-load conditions
• 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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