CAD-designed Wagner Tuning downpipe kit for BMW's N55 turbo engine, built without a primary catalyst for maximum flow. This kit replaces the restrictive factory downpipe/catalyst section to reduce back pressure, lower thermal load on the turbocharger, and deliver the largest gains in power and torque — intended for off-road/track use.
- Diameter: Ø76mm
- High-grade cast stainless steel (SS304)
- CAD-designed
- 2x lambda sensor bungs
- No primary catalyst
- 100% direct-fit replacement for the factory part
- Reduces thermal load on the turbocharger
- More power through reduced back pressure
- Noticeably increased torque
Fits the following models:
- BMW 135i E82/E88
- BMW 335(x)i E90/E91/E92/E93
Note: ECU remapping may be required after installation to prevent fault codes in the engine management system. Off-road/track use only — not type-approved for road use (not EU/EC homologated).
E9x Performance Parts is an authorized reseller of Wagner Tuning products. We are not sponsored by, endorsed by, or affiliated with BMW.
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