Product details
OVERVIEW
Dinan’s Free Flow Axle-Back Exhaust for the F10 550i improves exhaust flow by reducing back pressure, which raises power output and produces a sporty note that stays civilized at cruise and turns pleasantly aggressive under harder acceleration, with zero drone. 100% stainless steel construction and exacting dimensions let the system hang on the factory brackets and resist corrosion for years.
A vacuum-controlled butterfly valve improves flow at wide-open throttle while keeping things quiet and drone-free the rest of the time. The design also reduces overall weight and finishes with quad 3.5" tips — polished stainless or ceramic black — for a tasteful high-performance look.
SPECS
- Max gains: +10 HP when coupled with Dinan engine software
- Vacuum-controlled butterfly valve improves flow at wide-open throttle
- Quad 3.5" laser-engraved exhaust tips, polished stainless or ceramic black
- 100% 304 stainless steel construction
- Drone abatement technology used to reduce cabin resonance
- Uses the factory brackets and hangers for factory-like fitment
- Emissions, per Dinan: “This part is 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 warranty: if the vehicle is still covered by the BMW new-car limited warranty, the part is warranted for the remainder of that coverage, limited to 4 years / 50,000 miles; otherwise 2 years, unlimited mileage from the date of original purchase. Wear items, maintenance parts and fluids are excluded.
PARTS INCLUDED
- 1x Left muffler assembly (D663-0223)
- 1x Right muffler assembly (D663-0224)
- 1x Hardware kit (D663-0229) — tie straps, couplers, protective sleeves, bolts and washers
TECH RESOURCES
Additional Parts Required
- None. Dinan specifies no additional hardware for this part — couplers and mounting hardware are supplied and the system reuses the factory hangers.
- Optional: Dinan quotes the +10 HP figure only when the exhaust is combined with Dinan engine software. Speed Logic does not currently list Dinan engine software — contact us for availability.
- Customer-supplied tools and a vehicle lift are required.
Installation
Notes
- Dinan’s installation instructions are written for the 2011-2014 550i / 550i xDrive (F10); Dinan catalogs the part for the 2011-2016 550i.
PART NUMBER
- D660-0036-BLK — ceramic black tips
- D660-0036 — polished stainless tips
VEHICLE APPLICATIONS
| Make | Model | Chassis | Engine | Years |
|---|---|---|---|---|
| BMW | 550i / 550i xDrive | F10 | N63 4.4L V8 | 2011–2016 |