Crest Automotive Tuning - A) ENGINE PERFORMANCE (See also forced induction & remapping sections)

Product Code: 3900020header

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Macht Schnell's Performance Headers for the S54 powerplant are a direct replacement for your restrictive OEM BMW headers. Inspired by BMW's own Motorsport CSL headers, the Macht Schnell Performance Headers are mandrel bent and precision welded for optimal flow and maximum horsepower gains.

Laser cut 3/8" thick single header flanges create a perfect seal and prevent warping over time, while still allowing for stock header studs to be used. Matte black ceramic thermalcoating is performed on both interior and exterior surfaces, improving thermal efficiency of the headers. maintaining exhaust velocity, reduces heat radiation while preventing corrosion.

OEM 02 sensor and EGR bung locations are maintained while adding an additional bung for aftermarket wideband O2 sensor monitoring.

Compatible for both S54-equipped E46 M3 Coupe/Convertible & Z3M/Z4M Models

*(LHD MODELS ONLY)*

Performance Header Features:

- Direct replacement for factory headers
- Matte Black ThermalCoating resists temperatures of up to 2500F
- Reduced underhood temperatures
- Precision welded joints
- Heavy-Duty Laser Cut Exhaust Flanges
- Allows proper clearance of FCABs and Engine Mounts
- Factory O2 & EGT locations retained
- Additional O2 Bung allows for Wideband O2 monitoring
- Replacement gaskets & fasteners included

Note: Relocation or deletion of primary cats from factory location is required. This product is intended to be used only on racing vehicles on closed courses, and not for use on roads or vehicles otherwise subject to emission control requirements

Models Supported:

- 2000-2006 E46 M3
- 2000-2002 E36 Z3M
- 2006-2008 E85 Z4M

Estimated Volumetric Shipping Weight : 20.00 Kg