+67 moreBMW N63 F07 F10 F11 550i F12 F13 650i X5 X6 Bolt-Flange Downpipes With Heat Shield
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Description
DCE Parts – BMW N63 550i / 650i / X5 X6 50i Bolt-Flange Downpipes With Heat Shield
The DCE Parts Downpipes for the original BMW N63 V8 are available in a Catless Heat Shield version or with High Flow 200 Cell Catalytic Converters and Heat Shield. Supplied as a pair, these downpipes replace the factory catalytic converter assemblies for both cylinder banks.
This is the bolt-flange version for the original N63 engine, with bolted lower flange connections to the separate connecting pipes. It is different from the later N63TU / N63N slip-on version with integrated outlet bends and lower clamp connections.
A less restrictive downpipe configuration can reduce exhaust back pressure and give the N63 V8 a more pronounced exhaust sound. Changes in turbo response and power depend on the vehicle, the selected version and ECU calibration. No fixed power increase is specified.
The heat shielding helps limit radiant heat around the downpipes. Professional installation is recommended, including checking the exhaust connections, sensor positions and surrounding clearances.
Available versions:
- Catless Heat Shield: downpipe pair without catalytic converters, with heat shielding.
- High Flow Cat 200 Cell With Heat Shield: downpipe pair with 200 cell high-flow catalytic converters and heat shielding.
BMW applications — original N63 bolt-flange configuration only:
- BMW F07 550i / 550i xDrive Gran Turismo with the original N63 engine.
- BMW F10 / F11 550i / 550i xDrive with the original N63 engine. For the F10, generally production up to June 2013, with European factory output of 407 hp / 300 kW.
- BMW F12 / F13 650i / 650i xDrive with the original N63 engine and matching lower flange connections.
- BMW E70 X5 xDrive50i / E71 X6 xDrive50i with matching original N63 exhaust connections.
Production changeovers differ between models. The F10 changeover date must not be applied to the entire model range. Compatibility must be checked using the VIN and original exhaust configuration.
BMW OE reference numbers:
| Cylinder bank | OE references |
|---|---|
| Cylinders 1–4 | 18327645234 / 18327645232 |
| Cylinders 5–8 | 18327645235 / 18327645233 |
| Earlier OE references for the corresponding assemblies | 18307576993 / 18307576994 |
OE numbers are provided for identification and fitment comparison. Not every number applies to every vehicle.
Fitment verification:
Please provide your VIN, production date and photographs of the original downpipe connections before ordering if compatibility is uncertain. The N63 designation alone does not confirm fitment.
Not suitable for N63TU / N63N slip-on connections, F15 / F16 50i models, or G30 M550i / M850i N63R and OPF applications.
Please note:
These products are intended for off-road or motorsport use. No vehicle-specific road-use approval is supplied. A 200 cell catalytic converter does not by itself establish road-use approval.
ECU calibration requirements and the possibility of a check-engine light depend on the vehicle and selected version. Fault-free operation without software changes is not guaranteed.
Please send us your VIN when in doubt.
FITTED AND TUNED IN ONE VISIT
The downpipe needs a remap to run right. Let our workshop in Woerden fit the parts and tune your car.
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Questions about this part?
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Emissions & road use
Catless, cat-delete and OPF/GPF-delete versions are intended for motorsport and off-road use only. Fitting them on a road-registered vehicle may not be permitted in your country and can affect type approval, inspections (MOT/APK/TÜV), warranty and insurance. Versions with a 200- or 300-cell high-flow catalytic converter keep a catalyst in place. Always check your local regulations before fitting. Catless and delete parts are not shipped to the United States.
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