Patented Filter Assemblies make Engine Inspection Quick & Easy!
Developing the Future of Oil Filtration!

6″ Screw-On Oil Filter Assembly


6″ Screw-On See Through Filter Assembly with #12 Ports and 380 Micron Element, for running all weight oils up to 70 weight. This *NEW* 380 Micron Screen is for Extreme Diesel Engines and Six Cylinder Diesel Tractor Pullers. Dual Filtration is recommended for motor sports ran on dirt and pushing high volumes of oil. This Filter Assembly uses HP-6 size and style disposable filter.
  • Part Number: 126-380 & 126-380-B
  • Smallest Particles Filtered: depends on the disposable filter microns, varies on brand
  • Recommended Disposable Filter: (not included)
    K&N #HP-5001 or
    WIX #51222R or
    John Deere #RE21058
    BlackOut Series can use Napa Gold filters
  • Disposable Filter Thread Size: 1-1/2” – 12 TPI
  • Bypass Relief Valve: Yes
  • Inlet & Outlet Fitting: #12 O-Ring Boss – 1 1/16” – 12 TPI
  • Operating Temp: max 220 degrees Fahrenheit
  • Operating Pressure: max 150 PSI
  • Height: 3.250 in.
  • Width: 6.750 in.
  • Length: 7.750 in.
  • Filter Weight: 6.1 pounds
  • Sold as Kit including; Filter Assembly,
    380 Micron Element, and Bracket Kit
    (**WARNING Filter Nuts and Bracket bolts are shipped
    un-tightened they need to be tighten before filter is used.**)
  • Recommended: Extra Filter Element Part # 118-380
  • Suggested Replacement Parts:
    ~Window Part # 105-480
    ~O-Ring Kit Part # 120
    ~Filter Stud Kit (set of 2) Part # 135
    ~Air Fitting Part # 148
    ~Oil Pressure Port Fitting Part # 169
    ~Block Adapters also available
  • Filters are Clear or Black Anodized for Protection and Durability.

Part# 126-380
6″ Screw-On See Through Filter Assembly
#12 ports and 380 micron element
Price $679.95

Part# 126-380-B
6″ Screw-On Black Out See Through Filter Assembly
#12 ports and 380 micron element
Price $704.95

This filter was designed and recommend for tractor pulling and other motor sports ran on dirt. This filter uses a very coarse 380 micron element which allows diesel soot and microscopic particles to flow into the disposable filter. The oil first flows through the See Through Filter which the filter element traps the larger particles that can be viewed and inspected while the microscopic particles flow into the disposable filter or a system 1 unit and are filtered out of the oil. The filtered oil then flows out of the filter assembly through the outlet opening. This dual stage filter will extend the life and flow of the disposable filter and still allow visual inspection of filtered particles without draining or leaking any fluid, unbolting or loosening any fasteners or fittings and with out any loss of oil. Seeing these filtered particles will help determine if they are from normal use or from bearings and other components excessively wearing in the engine or machinery supplying the Filter Assembly.
  • Filters are machined with a flat sealing surface, so a large 5” diameter 12-1/4” long System 1 billet pro series filter p#904 will also work.
  • When running Diesel Fuel and a Screw-On Filter a 380 micron element is recommended.
  • Filters have 2 Inlet and 2 Outlet Openings that are threaded for #12 O-Ring Boss – 1-1/16-12 TPI fittings. The Inlet and Outlet Ports are machined to 7/8” diameter and will flow a #16 line when using #12 O-Ring Boss to #16 JIC bored out fittings. All 4 ports can be used, but #16 fittings can not go in and out of the same side of the filter assembly.