Product details
OVERVIEW
Dinan's Free Flow Axle-Back exhaust for the F87 M2 uses the factory exhaust valve together with Dinan's own muffler design to deliver track-exhaust aggression and daily-driver refinement in one system. The valve limits noise during low-speed driving and opens fully under high load; with the valve open the system becomes a straight pipe through 3.25" tubing for peak power, flow and tone. Construction is 100% 304 stainless steel, dyno tuned for maximum exhaust flow with minimum backpressure, giving a more aggressive sound under acceleration while reducing drone inside the car.
Exhaust gases exit through Dinan's signature enlarged quad 3.5" laser-engraved black ceramic tips, so the car looks the part as well as sounding it.
SPECS
- Power gain: maximum +6 HP and +5 lb-ft of torque
- Quad 3.5" laser engraved black ceramic tips with Dinan logo
- Computer controlled valve limits noise at low speed and opens fully under high load
- Stock exhaust valve actuators are reused
- Straight-through 3.25" tubing when the valve is open
- 100% 304 stainless steel construction
- Dyno tuned for maximum flow with minimum backpressure; reduced in-cabin drone
- Uses the factory brackets and hangers for factory-like fitment
- Emissions: legal for sale or use 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
- Dinan limited warranty: if the vehicle is still covered by the BMW new-car warranty, the part carries the remainder of that warranty up to 4 years / 50,000 miles; otherwise 2 years, unlimited mileage. Wear items are excluded.
PARTS INCLUDED
- (1) M2 muffler assembly — D663-0291A-BLK
- (1) Exhaust valve assembly — D663-0316
- (1) Hardware kit — D663-0289A, containing (1) fixing bow (BMW 18 30 7 620 323), (1) extension harness (D662-0431), (1) valve mount (D662-0433), (1) 80mm exhaust clamp (D662-9245) and the M6 fasteners and washers
TECH RESOURCES
Additional Parts Required
- None. Dinan specifies no additional hardware for this part — the valve assembly, clamp and mounting hardware are included and the stock valve actuators are reused.
- Optional pairing: Dinan Resonator Delete Kit — 2016-2017 BMW M2, which Dinan tuned to work with this exhaust.
Installation
PART NUMBER
- D660-0056-BLK — black ceramic tips
VEHICLE APPLICATIONS
| Make | Model | Chassis | Engine | Years |
|---|---|---|---|---|
| BMW | M2 Coupe | F87 | N55 3.0L Turbo I6 | 2016–2018 |