Photos shown for illustration; shade and shape may differ slightly.
Tegiwa 4 Inch Stainless Decat Downpipe for the BMW M135i, M235i, 335i and 435i with the N55 Engine, 2013 on
Supplier stock
The Tegiwa 4 inch (102 mm) decat downpipe fits every N55 engine built from July 2013: M135i, M235i, 335i and 435i. The tubing and flange are T304 stainless, TIG welded, and the tube is mandrel bent so no mid-range torque is lost. Without the catalyst the turbo spools faster and the engine responds more sharply to the throttle.
Specifications
| Brand | Tegiwa |
| Code | T-N55-DP-LATE |
| Diameter | 4 inch (102 mm) |
| Material | T304 stainless steel, TIG welded |
| Tubing | mandrel bent |
| Engine | N55, built from July 2013 |
Which cars it fits
- BMW M135i and M135i xDrive F20, F21 (N55)
- BMW M235i F22 coupe and F23 convertible (N55)
- BMW 335i and 335i xDrive F30 saloon, F31 Touring, F34 Gran Turismo (N55)
- BMW 435i and 435i xDrive F32 coupe, F33 convertible, F36 Gran Coupe (N55)
What to check
- It does not fit N55 engines built before July 2013; those take T-N55-DP-EARLY.
- It removes the catalytic converter: a competition part, and the car is no longer road legal.