BMW E46 M3 CSL PERS Motor S54B32 – 3,000 km, Wehtje Carbon Airbox, Original

Unleash the true potential of your BMW E46 M3’s S54B32 engine with the Wehtje Performance Carbon Airbox—a mastercrafted, direct-fit induction system designed to replicate the legendary CSL’s aggressive intake roar and deliver measurable gains of up to 360 horsepower. Meticulously engineered in Germany using aerospace-grade carbon fiber and precision-machined components, this airbox is the ultimate OEM+ upgrade for purists and performance enthusiasts seeking an authentic CSL experience.

Features & Benefits:

• Authentic CSL Performance & Sound: Experience the iconic, high-frequency induction scream and improved throttle response that defined the E46 M3 CSL, with a proven power increase to ~360HP (on tuned engines).

• Aerospace-Grade Carbon Fiber Construction: Handcrafted using autoclave-cured, lightweight carbon fiber for superior heat insulation, durability, and OEM-quality finish. Includes authentic CSL-style velocity stack and high-flow air filter.

• Perfect OEM Fitment: Designed as a direct replacement for the stock airbox, with pre-installed mounting points for factory sensors (e.g., MAF, IAT) and OEM-style fittings. No cutting or modification required.

• Complete Plug-and-Play Kit: Includes everything for a seamless installation:

  • Wehtje carbon airbox with integrated velocity stack

  • High-flow air filter element

  • All necessary gaskets, brackets, and hardware

  • Pre-configured mounting for OEM sensors

• Compatibility: Optimized for all E46 M3 S54B32 engines (including non-CSL models) and compatible with CSL-style ECU tuning for maximum power gains.

Technical Specifications:

• Material: Autoclave-cured carbon fiber (gloss or matte finish)

• Power Gain: Up to 360HP (with CSL-style software tune)

• Fitment: BMW E46 M3 (S54B32 engine)

• Included: Airbox, filter, velocity stack, mounting hardware

• Origin: Engineered and made in Germany

Why Choose the Wehtje Carbon Airbox?

• CSL Heritage, Modern Engineering: Recreates the CSL’s legendary intake system with improved airflow and modern material science.

• Track-Ready Performance: Reduces intake air temperatures (IATs) for consistent power delivery during spirited driving and track use.

• OEM Reliability: Unlike generic replicas, the Wehtje airbox integrates seamlessly with factory engine management systems and maintains daily drivability.