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Install: Delta Force Universal Performance Air Intake System 615400YouTube Button
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Flowmaster Delta Force Performance Air Intake

Universal 4.00-inch Air Intake System.

PART# 615400

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$360.95   Your Price
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Universal 4.00-inch Air Intake System, fabrication required.


The Delta Force "U-fit" air intake kit is perfect for the person doing an engine transplant in a "classic car" or race vehicle and needs a solution for fabricating a custom air intake. This universal system comes complete with a custom molded Cross-Linked Polyethylene (XLPE) high-flow 4.00-inch intake tube with numerous pre-set cut guides and various bend angles for versatility and adaptation under the hood. Also includes a large diameter high-flow 8-layer cotton gauze air filter, which traps more dirt than typical 6-layer designs and comes pre-oiled and ready to run. The filter is reusable and should provide a lifetime of service when maintained properly with our Delta Force Refresh kit #615001. Other features include a blade style MAF sensor adapter, various sizes of high quality reinforced silicone couplers, stainless steel clamps, universal brackets and hardware to help fabricate a complete air intake system. Note: Some tuning may be required. This intake system is intended for use on pre-emissions vehicles, or non-street legal competition race vehicles only. Fabrication required.


  • Serviceable Lifetime High-Flow 8 Layer Cotton Gauze Filter
  • Adjustable Mounting Brackets and Hardware
  • Universal Performance Air Intake System
  • Includes Reinforced Silicone Couplers
  • Includes Blade Style MAF Adapter
  • Contains Various Bend Angles
  • Numerous Pre-set Cut Guides
  • High Quality Components
  • Stainless Steel Clamps
  • Flowmaster Quality


Air Box IncludedNo
Air Filter Element ColorRed
Air Filter Element MaterialOiled Cotton
Air Filter Element WashableYes
Air Filter Heat Shield IncludedNo
Air Filter Inside Diameter (in)6
Air Filter Oil IncludedPre-Oiled
Air Filter Outlet ShapeCircular
Air Filter Outside Diameter (in)7.5
Air Filter Overall Height (in)7.5
Air Filter Overall Width (in)7.5
CARB (California) CompliantNo
Clamp Quantity Included12
Coupler MaterialSilicone
Coupler Quantity Included9
Emission Code3
Filter ShapeCone
Fuel TypeUniversal
Intake Pipe Inlet Width (in)4
Intake Pipe MaterialPolyethelene
Intake Pipe Outlet Width (in)4
MAF Sensor Adapter IncludedYes
Mounting Hardware IncludedYes
Product TypePerformance Air Intakes
Replacement Filter PN (Dry)615011D
Replacement Filter PN (Oiled)615011
Special Fitment InfoUniversal
Part Number615400



This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition and that are not registered and that may never be used on the street

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle
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