CSF csf8401 B58 No Limit Billet Air-to-Air Competition Manifold

Track proven and tested in the extreme Texas heat with ambient temperature consistently over 90°F (32°C) at TX2K by three S58 vehicles. All three posted times of 7-seconds, including new world record holder of the "Fastest BMW in the World" Tom Wrigley Performance in his G80 M3 race car (7.67 seconds at 183mph). The street driven GTP Motorsport G87 xDrive M2 also set the M2 World Record with a time of 7.84 seconds at 178mph. 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. The CSF #8401 Cooling product is designed to be a "Custom Fit" application. The product installion may require modifications. If you do not feel confident installing this product CSF recommends taking it to a qualified installation facility.

• Includes CSF's proprietary Thermal Rejection Manifold Spacer - Proven to lower intake manifold temperatures by up to 15%
• Modular Ports on the Top of Each Cylinder Runner that can also be used for Nitrous or Methanol Injection
• Throttle Body Flange is engineered to accommodate a larger 77mm S55 throttle body (BMW 13-54-7-597-871)
• Comes Finished in Raw Billet Aluminum - Custom Finishes available (Powder Coat, Cerakote, or Anodizing)
• Two Integrated Sensor Pads to Measure Additional Parameters or as Extra Sources of Vacuum
• High-pressure o-ring sealed construction designed to withstand 100+ psi (7+ Bar)
• CSF recommends using VTT-FAB Extension Harnesses - B58/S58 to S55 TB Conversion
• Plenum inlet angle optimally designed for easier intercooler pipe routing
• Fully CNC machined 6061 Billet Aluminum Made by CPC (Made in Australia)
• Includes Hardware and Installation Kit with picture diagrams and BOM
• One Fuel Rail for Top Feed Port Injection (for 6 Injector setup)
• Top Feed Port Injection - capable of running 6 or 12 injectors.
• Includes One OEM TMAP, Two 1/4 NPT, and Four 1/8th NPT Ports
• Individual Runner Nitrous / Methanol adapter kit - CSF #8403
• 2nd Fuel Rail (for 12 Injector setup) - CSF #8404
• Optional Add-Ons (not included):
• 6 Injector Block Off Plugs
• Internal Velocity Stacks
• Includes:

The CSF csf8401 No Limit Billet Air-to-Air Competition Manifold is a custom-fit application developed for B58-powered performance vehicles. Its manifold design removes the charge cooler from the intake manifold, addressing the core size limitations associated with available drop-in fit options. The design has been track tested in extreme Texas heat, including applications that achieved seven-second quarter-mile times.

Performance-focused features include CSF’s proprietary Thermal Rejection Manifold Spacer, modular ports on each cylinder runner, an inlet angle designed to simplify intercooler pipe routing, and a throttle body flange engineered to accommodate the larger 77mm S55 throttle body. The high-pressure O-ring-sealed construction is designed to withstand more than 100 psi, while two integrated sensor pads provide additional measurement or vacuum-source options.

The manifold is fully CNC-machined from 6061 billet aluminum by CPC in Australia and comes finished in raw billet aluminum. It supports top-feed port injection with six or twelve injectors and includes one fuel rail for a six-injector setup. The CSF #8401 is a custom-fit product, and installation may require modifications. CSF recommends installation by a qualified facility if you are not confident performing the work.

Key Features & Performance Benefits

• Thermal Rejection Manifold Spacer: Proven to lower intake manifold temperatures by up to 15%.
• Modular Runner Ports: Provide provisions that can also be used for nitrous or methanol injection.
• High-Pressure Construction: O-ring-sealed design is intended to withstand more than 100 psi.
• Optimized Inlet Design: Plenum inlet angle supports easier intercooler pipe routing.

Product Specifications & Technical Data

• Brand: CSF
• Part Number: csf8401
• Product Type: B58 No Limit billet air-to-air competition manifold
• Material: CNC-machined 6061 billet aluminum
• Manufacturing: Made by CPC in Australia
• Throttle Body Provision: Engineered for a 77mm S55 throttle body
• Port Injection: Top-feed design capable of six or twelve injectors
• Fuel Rail: One fuel rail for a six-injector setup

What’s Included

• CSF Thermal Rejection Manifold Spacer
• One fuel rail for a six-injector setup
• One OEM TMAP port
• Two 1/4 NPT ports
• Four 1/8 NPT ports
• Hardware and installation kit with picture diagrams and bill of materials

Fitment

Fits 2020 BMW M340i, 2020 BMW M340i xDrive, 2020 Toyota GR Supra, 2021 BMW M340i, 2021 BMW M340i xDrive, 2021 BMW M440i xDrive, and 2021 Toyota GR Supra applications as listed by the supplier. Modifications may be required for installation.

Fitments:
2020 BMW M340i Base
2020 BMW M340i xDrive Base
2020 Toyota GR Supra Base
2020 Toyota GR Supra Launch Edition
2020 Toyota GR Supra Premium
2021 BMW M340i Base
2021 BMW M340i xDrive Base
2021 BMW M440i Base
2021 BMW M440i xDrive Base
2021 Toyota GR Supra A91 Edition
2021 Toyota GR Supra Base
2021 Toyota GR Supra Premium
2022 BMW M240i xDrive Base
2022 BMW M340i Base
2022 BMW M340i xDrive Base
2022 BMW M440i Base
2022 BMW M440i Gran Coupe Base
2022 BMW M440i xDrive Base
2022 BMW M440i xDrive Gran Coupe Base
2022 BMW Z4 M40i
2022 Toyota GR Supra A91 Edition
2022 Toyota GR Supra Base
2022 Toyota GR Supra Premium
2023 BMW M240i Base
2023 BMW M240i xDrive Base
2023 BMW M340i Base
2023 BMW M340i xDrive Base
2023 BMW M440i Base
2023 BMW M440i Gran Coupe Base
2023 BMW M440i xDrive Base
2023 BMW M440i xDrive Gran Coupe Base
2023 BMW Z4 M40i
2023 Toyota GR Supra A91 Edition
2023 Toyota GR Supra Base
2023 Toyota GR Supra Premium
2024 BMW M240i Base
2024 BMW M240i xDrive Base
2024 BMW M340i Base
2024 BMW M340i xDrive Base
2024 BMW M440i Base
2024 BMW M440i Gran Coupe Base
2024 BMW M440i xDrive Base
2024 BMW M440i xDrive Gran Coupe Base
2024 BMW Z4 M40i
2024 Toyota GR Supra 45th Anniversary Edition
2024 Toyota GR Supra Base
2024 Toyota GR Supra Premium
2025 BMW M240i Base
2025 BMW M240i xDrive Base
2025 BMW Z4 M40i
2025 Toyota GR Supra Base
2025 Toyota GR Supra Premium
2026 BMW M240i Base
2026 BMW M240i xDrive Base
2026 BMW Z4 M40i
2026 Toyota GR Supra Base
2026 Toyota GR Supra MkV Final Edition
2026 Toyota GR Supra Premium

Air Freight Prohibited: false
Not Carb Approved: true
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: N
Part Type: automotive
Epa: N/A
Regular Stock: t
Units Per Sku: 1