MAC Valve (Holley CO2 Boost Control Solenoid) 90° Mounting Bracket 21-10005

Motion Raceworks



Motion Raceworks - 21-10005


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Racing Use Only, Not Legal for Road Use

MAC Valve (Holley Boost Control Solenoid) 90° Mounting Bracket 21-10005

Running a dual solenoid boost control setup is becoming the standard across EFI systems, and boost controllers.  However, there is always confusion on plumbing and mounting.  It is always a pain sourcing fittings and making bracketry.  

We decided to make it easy with this bracketry setup.  This setup allows you to mount using bolts through sheet metal/brackets, or clamp to a chassis bar.  Connects solid with a T, and gives inlet and outlet possibilities.  We thought of everything with this.  



  • Black Anodized Bracket 90°
  • Hardware
  • (2) bar clamps
  • Nickel plated T with 1/8NPT female outlet
  • Optional Solenoids (These are the exact solenoids Holley and other manufacturers use, just without their label).  

For full plumbing questions, reference the attached diagram.  

Want to learn how to setup and tune a boost controller? Watch this video!

Plumbing CO2 Boost? Watch this video for some awesome tips and information!