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Believe It Duramax 6.6l Bypass Oil Filter Kit "under The Hood" (2001-2019) Perfect Gift [3jfYlxhk]

$59.99 $191.99 -69%

Duramax 6.6L Bypass Oil Filtration System  with Under-the-Hood Bracket (2001 to 2019)Parts Included In This Kit1 EXTREME 2 bypass oil filter housing (HX2SHBK) (HX2SHBLU) (HX2SHRED)1 EXTREME 2 filter element (EX2SE) with o-rings (GX1/2)2 In/Out fittin

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Duramax 6.6L Bypass Oil Filtration System  with Under-the-Hood Bracket (2001 to 2019)

Parts Included In This Kit

  • 1 EXTREME 2 bypass oil filter housing (HX2SHBK) (HX2SHBLU) (HX2SHRED)
  • 1 EXTREME 2 filter element (EX2SE) with o-rings (GX1/2)
  • 2 In/Out fittings (AN06-04MS90)
  • 2ft and 5ft hose (LW06BK)
  • 1 Under-the-hood bracket with bolts (UTHS)

Pressure Port

  • 1 Pressure port fitting (6MBPRR) with o-ring (O16) and fittings (AN06-02MP90 + AN06-06FJ)

Return Port

  • 1 Oil filler cap (FLLCDUO) with o-ring (ODU) and fitting (AN06-02MS90)

Important notes regarding 2020+ Newer Duramax 6.6L Engines
2020+ Duramax vehicles require oil to be returned to the oil drain plug rather than the oil filler cap. 

 Installation Guide: 

Important: Aluminum straight thread fittings are made for no more than 60 inch pounds of torque.

Important: Does not work with Dual Alternators.  Use "Frame Mount" instead

Duramax 6.6 Installation Guide (PDF)

Duramax 6.6 Under-the-Hood Kit (VIDEO)

BENEFITS OF ULTRA-FINE OIL FILTRATION

• Radically extend engine life 2X
• Reduce engine wear
• Keep oil up to 4X cleaner than new oil
• Progressive 3 stage filtration down to 1 micron, won't clog or drop efficiency like others filters
• Reduce soot and carbon buildup
• Reduce erosion of hoses & seals
• Extend oil change intervals
• Remove 99.9% of moisture
• Improve gas mileage
• Improve oil cooling
• Large housing holds 4000X more contaminants than OEM filters
• Easy installation and maintenance
• 15K (or up to *25K miles) 250 hours, or 1 year before maintenance is needed
• *Condition based oil analysis monitoring recommended when extending oil/filter change intervals

 Learn More About the EXTREME Bypass Oil Filter System Here


• Installation/assembly required by professional mechanic

 

What Our Customers Say

January 5, 2026

Absolutely no complaints!

A wonderful tool that is easy to use.

- Thomasina P..

January 5, 2026

Absolutely no complaints!

An excellent tool. It is very solid.

- Fraser Q..

January 5, 2026

Absolutely no complaints!

A great find. The quality is amazing.

- Marius G..

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