Description
Inspired by the legendary E60 M5 CSL prototype, the Infinity Design CSL Carbon Plenum and Intake Kit is the ultimate upgrade for BMW S85 enthusiasts seeking performance, induction sound, modularity, and OEM-level fitment precision.
This is not just another carbon plenum for noise alone. Infinity Design engineered this system from the ground up, using precise 3D scans of the S85 engine bay and OEM components to develop a one-of-a-kind modular carbon fibre plenum system that improves performance, reliability, and ease of installation. The result is a system that truly elevates the driving experience of one of the last great naturally aspirated V10 engines.
Real Performance Gains
The CSL Carbon Plenum delivers dyno-tested gains of 12–15 horsepower at high RPM, with significantly improved throttle response and a deeply aggressive CSL-style induction note. The system’s velocity stack layout and enlarged side inlets direct airflow more efficiently toward the intake runners, reducing restriction and enhancing usable torque and throttle sensitivity.
Modular Engineering Advantage
Unlike traditional one-piece plenums that are difficult to fit due to the 120° throttle body arrangement on the S85 engine, the Infinity Design modular design allows each component to be fitted step-by-step. This eliminates the risk of air leaks, simplifies installation, and allows for future upgrades or configuration changes.
Benefits of Modularity:
- Easy, leak-free installation with no force or misalignment
- Swappable velocity stacks for powerband tuning (shorter stacks for high-RPM bias)
- Replaceable side inlets (OEM-style or CSL-style high-volume configuration)
- Reduced manufacturing cost due to eliminated assembly process
- Improved reliability from bolted-in velocity stacks—not glued—eliminating failure risk
Specifications:
- Pre-preg & autoclave carbon fibre construction
- Modular system design for fitment, upgrades, and servicing
- Gloss or Matte clear-coated finish options
- Exceptional CSL-style induction sound
- Enhanced throttle response
- Plug & Play fitment with AlphaN software tuning required
- Installation time: 2–3 hours
Included Components:
- 1x Main Carbon Plenum
- 10x Pre-Preg Carbon Fibre Velocity Stacks
- 10x CNC-Machined Aluminium Throttle Body Bosses
- 2x CSL-Style Carbon Side Inlets (Right & Left)
- 2x CSL Inlet Tubes (Right & Left)
- 2x CSL Lower Air Filter Housings (Right & Left)
- 1x Carbon Lid
- 2x High-Flow Infinity Design Air Filters
- 2x Silicone Couplers
- 4x SS-304 Stainless Steel Clips
- 2x Black SS304 V-Band Clamps
- 20x M5x16mm Stainless Steel Black Bolts
- 27x M4x12mm Stainless Steel Black Bolts
Fitment:
This CSL carbon plenum and intake system is specifically designed to fit:
- BMW E60 M5 (2006–2010)
- BMW E63 M6 (2006–2010)
- Equipped with the S85 5.0L V10 engine
- AlphaN tuning required.
