CSF “No Limit” Billet Air-to-Air Competition Intake Manifold

The CSF “No Limit” Billet Air-to-Air Competition Intake Manifold (CSF8401) for the Toyota Supra / BMW B58 platform is a purpose-built solution for serious drag and roll-racing builds that have outgrown the limits of factory-style charge-cooled manifolds. Developed in partnership with Custom Plenum Creations (CPC) in Australia, this manifold relocates charge cooling to the front of the car, allowing you to run a much larger external intercooler core for significantly improved charge-air control at extreme power levels.

Track-proven in the brutal Texas heat during TX2K 2026, CSF’s new “No Limit” competition manifold design has already helped push X58-powered BMWs into the 7-second quarter-mile range. By removing the restrictive integrated charge cooler from the intake manifold, the B58 “No Limit” manifold clears the way for both large front-mount air-to-air or air-to-water intercooler configurations while optimising airflow distribution into each cylinder.

The manifold is fully CNC-machined from solid 6061 billet aluminium, with an internally optimised plenum and integrated velocity stacks for each runner. Extensive CFD analysis was used to ensure even airflow and to avoid cylinder-to-cylinder imbalance or scavenging issues that could limit top-end performance. High-pressure o-ring sealing and CSF’s proprietary Thermal Rejection Spacer help the manifold withstand more than 100 psi of boost pressure while keeping intake temps in check.

With provisions for top-feed port injection (6 or 12 injectors), modular runner ports for nitrous or methanol injection, and an S55-style 77 mm throttle body flange, the CSF “No Limit” B58 manifold is designed as a complete motorsport package. It is aimed squarely at builds targeting 1,500+ WHP where reliability, airflow, and thermal control are critical.

Note: This manifold is for motorsport/competition use only and requires significant custom fabrication and tuning to install and operate correctly. Professional installation is strongly recommended.

• Purpose-built for high-power B58 builds
  Engineered specifically for the Toyota Supra / BMW B58 platform to support power levels beyond the typical 1,500 WHP ceiling of factory-style intake and charge-cooler systems.
• Air-to-air competition layout
  Deletes the integrated charge cooler from the intake manifold, allowing fitment of a much larger front-mounted intercooler core (air-to-air or air-to-water) for improved charge-air temperature control at high boost.
• 6061 billet aluminium construction
  Fully CNC-machined from solid 6061 billet aluminium by CPC in Australia, providing exceptional strength, stability, and consistency for extreme boost applications (100+ psi).
• Optimised plenum and velocity stacks
  Internal plenum volume and runner design are refined using CFD, with integrated velocity stacks for smooth, even airflow into each cylinder, improving efficiency and top-end power.
• High-flow throttle body compatibility
  Throttle body flange is designed for the larger 77 mm BMW S55 throttle body, providing greater airflow potential compared with the factory B58 unit (harness adaptor required).
• Top-feed port injection ready
  Supports 6 or 12 injectors with a supplied billet fuel rail and modular ports on each runner. Ideal for high-ethanol, secondary fuel, or staged-injection strategies.
• Integrated modular runner ports
  Each cylinder runner includes a modular port that can be used for secondary port injection (with optional second rail), nitrous, or methanol/water injection, allowing flexible configuration for different power goals.
• Comprehensive sensor and vacuum provisions
  Features two integrated sensor pads with ports for the OEM TMAP along with additional 1/4" and 1/8" NPT connections, simplifying the addition of sensors, boost reference, or vacuum sources.
• Thermal Rejection Manifold Spacer
  CSF’s proprietary competition spacer reduces heat transfer into the manifold, helping to lower intake manifold temperatures by up to 15% and improve intercooler effectiveness while combating heat soak.
• High-pressure sealing
  O-ring sealed interface surfaces throughout the manifold ensure reliable, leak-free operation under extreme boost pressure and potential backfire conditions.
• Race-proven development
  Developed with professional race teams and high-power street cars, leveraging feedback from leading S58/B58 builders to refine flow, fitment, and functionality.
• Raw billet finish with custom options
  Supplied in raw billet aluminium, with the flexibility for custom finishes such as powder coat, Cerakote, or anodising to suit your build.

• Application: Toyota Supra / BMW B58 (X58 platform) – competition use only
• Part number / SKU: CSF8401
• Construction: Fully CNC-machined from solid 6061 billet aluminium
• Manufacturing partner: Custom Plenum Creations (CPC), Australia
• Intercooler compatibility: External air-to-air or air-to-water front-mounted intercooler (custom setup required)
• Throttle body flange: Designed for 77 mm BMW S55 throttle body (BMW PN 13-54-7-597-871)
• Recommended wiring: VTT-FAB extension harnesses – B58/S58 to S55 throttle body conversion (not included)
• Plenum and runner design: CFD-optimised plenum volume with integrated internal velocity stacks
• Fuel system: Top-feed port injection
  – Supports 6 or 12 injectors
  – Primary rail: -8 ORB fitting
  – Secondary rail: optional CSF #8404 (sold separately)
• Runner ports (modular): Ports on each cylinder runner for secondary injection, nitrous, or methanol/water injection
• Sensor & vacuum ports:
  – Two integrated sensor pads
  – One OEM TMAP location
  – Two x 1/4" NPT ports
  – Four x 1/8" NPT ports
• Thermal management: Includes CSF Thermal Rejection Manifold Spacer (up to 15% reduction in manifold temps)
• Pressure capability: High-pressure o-ring sealed design, tested to 100+ psi (7+ bar)
• Finish: Raw billet aluminium (custom coatings/finishes can be applied by end user)
• Use case: Motorsport / off-road competition only; extensive custom fabrication and tuning required

• CSF “No Limit” Billet Air-to-Air Competition Intake Manifold – B58 (raw billet finish)
• Primary billet top-feed fuel rail for 6-injector port injection setup
• Six injector block-off plugs for unused secondary injector positions
• CSF Thermal Rejection Manifold Spacer
• Complete hardware and installation kit with picture diagrams and bill of materials (BOM)