Duramax 6.6L Bypass Oil Filter Kit "Under the Hood" (2001-2019)

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 (EX2ME) with o-rings (GX1/2)
• 2 In/Out fittings (AN06-04MS90)
• 2ft and 5ft hose (LW06BK) Notice: Hose ships uncut as a single 7' continuous length to allow flexible mounting and routing.
• 1 Under-the-hood bracket with bolts (UTHS)

Pressure Port Options

Duramax engines may be equipped with either the straight-thread plug or a tapered-thread plug. Scroll down to see the description between both and quickly identify which style is installed on your engine.

• Straight Thread:  (6MBPRR) + o-ring (O16) +  fitting (AN06-02MP90 + AN06-06FJ)
  
• Tapered Thread.  (6MBPTRR) + fitting (AN06-02MP90 + AN06-06FJ)

Return Port

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

How to Identify Your Pressure Port Thread: 

The image above has circled the pressure port plug to check:
 
Loosen or Remove the plug and use description below to identify your pressure port option: 

• If the plug has a flat shoulder/ledge that stops against the engine and may include a washer, crush washer, or o-ring then your pressure port option is "straight thread".

• If the plug does not have have a washer, crush washer, or o-ring then it is most likely a "tapered thread". 

Important note about removing the oil pressure plug: 

Some customers find it easy to remove this plug and others find it difficult. This is why we highly recommend removing the plug to verify the thread before ordering a kit. Here are some tips submitted by our customers to help with removing this plug: 

• Some suggest cutting an allen wrench to shorten the length to allow for additional room to use a breaker bar or other leverage device.

• Some recommend slightly lifting vehicle to drop suspension, this gives a little more room to work around the area. 

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.  If you have dual alternators use the "Frame Mount" version of this kit seen here.

The following installation guides are for older legacy kits. The fittings are different but the concept is the same, please use this as reference only. 

Duramax 6.6 Installation Guide (PDF)

Duramax 6.6 Under-the-Hood Kit (VIDEO)

BENEFITS OF ULTRA-FINE OIL FILTRATION