Exhaust Downpipe · SKU 701807502451
EXHAUST DOWNPIPE TURBO PIPE FOR 2014+ BMW 3 Inch S55 F80 F82 F83 M3 M4
A 3 inch mandrel bent T-304 stainless steel exhaust downpipe with CNC machined flanges for the 2014+ BMW S55 F80 F82 F83 M3 and M4. It replaces the factory turbo outlet pipe with a high flow non-resonated path and ships as a single piece with two black hardware pieces shown in the image. Fitment is specific to the listed models and does not cover other BMW platforms.
- MaterialT-304 Stainless Steel
- SurfaceMandrel Bent, Black Finish
- Size3 inch outlet, 2.5 inch inlet
- FlangeCNC Machined
What You Get
Key Benefits
- 3 inch mandrel bent T-304 stainless steel pipe reduces exhaust back pressure and improves turbine flow
- CNC machined flanges ensure a flat sealing face for a leak-free connection at the turbo joint
- TIG welded joints provide strong, consistent welds that resist cracking under heat cycling
- Black hardware included with the pipe matches the visual finish and reduces corrosion at bolt points
- Direct bolt-on fitment requires no cutting or welding, saving installation time and labour
Why Buyers Switch
Problems It Solves
- Factory turbo outlet pipes restrict exhaust flow and limit peak horsepower and torque
- Mild steel or low-grade stainless pipes warp or crack under repeated heat cycles
- Poorly fitted flanges leak at the turbo joint, causing noise and potential sensor errors
- Universal or cut-to-fit pipes require welding, which adds cost and complexity for shops
Where It Is Used
Application Scenarios
- Performance shops installing race-ready exhaust upgrades on S55-powered M3 and M4 models
- Distributors stocking high flow turbo pipes for the 2014+ BMW M3 and M4 market
- Online sellers needing a vehicle-specific part with clear fitment and a clean product image
Buyers
Who It Is For
- Performance parts distributors buying direct for the European and North American M3/M4 market
- Online auto parts sellers requiring a photographed, vehicle-specific part with a documented fitment
Construction
Technical Features
- Single piece 3 inch mandrel bent T-304 stainless steel downpipe with CNC machined flanges
- TIG welded joints for consistent, high-strength welds along the full length
- Inlet size 2.5 inch, outlet size 3 inch to match turbo and downpipe transition
- Non-resonated design for increased flow and engine response
- Black hardware included with the pipe as shown in the product images
- Direct bolt-on fitment with factory routing and mounting points
Data
Specifications
| Material | T-304 Stainless Steel |
|---|---|
| Surface | Mandrel Bent, Black Finish |
| Size | 3 inch outlet, 2.5 inch inlet |
| Flange | CNC Machined |
| Welding | TIG Welded |
| Fitment | 2014+ BMW F80 F82 F83 M3 M4 with S55 Engine |
| Exclusion | Not intended for street use; for racing and competition only |
Material
Materials
- T-304 Stainless Steel tube
- CNC machined steel flanges
- Black hardware (bolts, washers, nuts)
Manufacturing
How It Is Made
Mandrel bending of T-304 stainless steel tube to match factory routing
CNC machining of flanges for flat sealing faces and precise bolt hole alignment
TIG welding of flanges to tube with full seam coverage
Black coating applied to hardware and visible steel surfaces
Final inspection for weld integrity and surface defects before packing
Checks
Quality Control
- Flange bolt pattern and sealing face checked before welding
- Weld seams inspected for pinholes and incomplete fusion
- Surface finish checked for coating defects and handling marks
- Hardware verified against the image and included in the package
Private Label
Customisation Options
- Private label packaging and barcode labels available on request
- Bulk cartons for container orders instead of individual retail boxes
Comparison
Compared With The Alternatives
| Factory turbo downpipe | The stock pipe is tuned for emissions and noise, this one increases flow and power at the cost of street legality |
|---|---|
| Mild steel aftermarket pipe | Mild steel is cheaper but warps and fails under heat; T-304 stainless holds shape and resists oxidation |
| Universal cut-to-fit pipe | A universal pipe requires welding and fitting; this one bolts on directly with no modifications |
Installation
Use Guide
- Confirm the vehicle is a 2014+ BMW F80 F82 F83 M3 or M4 with the S55 engine
- Do not install on street-legal vehicles; this part is for racing and competition use only
- Replace the factory turbo outlet gasket with a new one to prevent leaks
- Torque flange bolts evenly in a cross pattern to maintain sealing face flatness
- Monitor for O2 sensor codes after installation; O2 simulators may be required
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Answers
Questions About This Part
Is this pipe legal for street use?
No. This part is intended for racing and competition purposes only and is not legal for street use in most markets.
What size is the inlet and outlet?
The inlet is 2.5 inch and the outlet is 3 inch. It connects from the turbo outlet to the downpipe section.
Are the flanges already welded on?
Yes. The CNC machined flanges are TIG welded to the pipe and ready to bolt on.
What hardware is included?
Two black hardware pieces are included with the pipe as shown in the product images.
Can I use this on a different BMW model?
No. This part is designed specifically for 2014+ BMW F80 F82 F83 M3 and M4 with the S55 engine.
Do I need to cut or weld anything?
No. The pipe is a direct bolt-on replacement and requires no cutting or welding.
Can we get private label packaging?
Yes. Private label packaging and barcode labels can be arranged, and bulk cartons are available for container orders.
Get This Part Quoted
Send the quantity you need and your market, and the reply will cover price, packing and lead time.