CSF 8401 Billet Competition Intake Manifold for TOYOTA GR Supra / BMW M240i (G42) / M340i (G20) / M440i (G22)

Description CSF 8401 Billet Competition Intake Manifold for TOYOTA GR Supra / BMW M240i (G42) / M340i (G20) / M440i (G22)

CSF’s new manifold design, which removes the charge cooler from the intake manifold, resolves the core size limitation of all drop-in fit options available on the market. This allows for a much larger intercooler core to be mounted in the front of the vehicle. Both external Air-to-Water and Air-to-Air intercoolers can be used with the CSF “No Limit” Manifold. Each type of setup was proven at TX2K 2026 by Tom Wrigley Performance (A2W) and GTP Motorsport (A2A).

The design optimizes plenum volume and refines runner design with integrated velocity stacks. CFD analysis was used to ensure there was no airflow imbalance and cylinder scavenging issues that could limit top end performance. Milled from solid 6061 billet aluminum and precision CNC-machined, this manifold delivers the strength, flow, and consistency needed for extreme-boost & high-performance setups.

Key features:

• Proven Results: Used on the world’s fastest BMWs at TX2K 2026
• Solid 6061 Billet Aluminium: CNC-machined for strength, consistency, and performance at extremely high power levels (1500+ HP).
• Internal Velocity Stacks: Results in smooth airflow into each cylinder, improving efficiency and top-end power.
• O-ring Sealed Surfaces: Ensures airtight sealing, no leaks, even under extreme boost and potential backfires.
• Large Throttle Body: Throttle Body Bolt Pattern is for an S55 throttle Body (77mm) which has a larger ID than the B58 and S58 (67-68mm).
• Integrated Sensor Pads: Two Integrated Sensor Pads to Measure Additional Parameters or Extra Sources of Vacuum.
• Race-Ready Package: Supplied with Billet Fuel Rail and features Modular Ports on the Top of Each Cylinder Runner that can be used for secondary port injection (requires optional 2nd rail), Nitrous, or Methanol Injection.
• Thermal Rejection Competition Spacer: Thermal Rejection Spacer reduces manifold temperatures which helps lower Intake Air Temperatures (IATs), improve charge air cooler efficiency, and combats heat soak.

Technical specifications:

• Fully CNC machined 6061 Billet Aluminum Made by CPC (Made in Australia)
• Internal Velocity Stacks
• Throttle Body Flange is engineered to accommodate a larger 77mm S55 throttle body (BMW 13-54-7-597-871)
  • CSF recommends using VTT-FAB Extension Harnesses – B58/S58 to S55 TB Conversion
• Top Feed Port Injection – capable of running 6 or 12 injectors.
• Modular Ports on the Top of Each Cylinder Runner that can also be used for Nitrous or Methanol Injection
• Two Integrated Sensor Pads to Measure Additional Parameters or as Extra Sources of Vacuum
  • Includes One OEM TMAP, Two 1/4 NPT, and Four 1/8th NPT Ports
• Includes CSF’s proprietary Thermal Rejection Manifold Spacer – Proven to lower intake manifold temperatures by up to 15%
• High-pressure o-ring sealed construction designed to withstand 100+ psi (7+ Bar)
• Includes Hardware and Installation Kit with picture diagrams and BOM
• S58 version comes with billet oil filter housing adapter to make filter accessible without removing the manifold
• Plenum inlet angle optimally designed for easier intercooler pipe routing
• Comes Finished in Raw Billet Aluminum – Custom Finishes available (Powder Coat, Cerakote, or Anodizing)

Includes:

• One Fuel Rail for Top Feed Port Injection (for 6 Injector setup)
• 6 Injector Block Off Plugs

Optional Add-Ons (not included):

• 2nd Fuel Rail (for 12 Injector setup)
• Individual Runner Nitrous / Methanol adapter kit

Applications:

• B58 (Gen 1 & 2) motors including swapped vehicles
  • 2020-2023 Toyota GR Supra 3.0L (Base)
  • 2020 Toyota GR Supra 3.0L (Launch Edition)
  • 2021 Toyota GR Supra 3.0L (A91 Edition)
  • 2020-2023 Toyota GR Supra 3.0L (Premium)
  • 2022+ BMW M240iX (G42)
  • 2018+ BMW M340i (G20)
  • 2018+ BMW M340iX (G20)
  • 2018+ BMW M340iX (G21)
  • 2020+ BMW 440i (G22)
  • 2020+ BMW 440i (G23)
  • 2020+ BMW 440i (G26)
  • 2017-2019 BMW F20/F21 M140i
  • 2017-2021 BMW F22/F23 M240i
  • 2016-2019 BMW F30/F31/F34 340i
  • 2017-2020 BMW F32/F33/F36 440i

Note:

This product is for motorsport use only and requires extensive modifications to install.

The throttle body flange is engineered to accommodate a larger 77mm S55 throttle body (BMW 13-54-7-597-871). CSF recommends using the VTT-FAB Extension Harnesses (B58/S58 to S55 TB Conversion) to simplify installation.