The Original Synthetic Oil
AMSOIL By-pass Oil Filter Mounting Kits
PRODUCT DESCRIPTION
The Ea By-Pass Oil Filter (EaBP) provides the best possible filtration protection against wear
and oil degradation. Working in conjunction with the engine’s full-flow oil filter, the AMSOIL Ea
By-Pass Filter operates by filtering oil on a “partial-flow” basis. It draws approximately 10
percent of the oil pump’s capacity at any one time and traps the extremely small, wear-causing
contaminants that full-flow filters can’t remove. The AMSOIL Ea Bypass Filter typically filters all
the oil in the system several times an hour, so the engine continuously receives analytically
clean oil.
BMK21
BMK22
BMK23
BMK23, 25, 26, & 27
New Aluminum Billet Oil Fill and Oil Filter Caps for BMK21 By-Pass Filtration System
AMSOIL offers by-pass components to ease the
installation of the BMK21 By-Pass Filtration System
in three popular diesel engines: the Ford 6.0L
Power Stroke™, the Dodge 5.9L Cummins and the
General Motors 6.6L Duramax.

Engine compartments are becoming increasingly
cramped, leaving little room for after-market
additions and improvements. The BMK21 is a single
remote by-pass filter system that fits into much
smaller spaces than the AMSOIL Dual-Remote By-
Pass System.
Higher Efficiency
AMSOIL EaBP Filters have an efficiency of 98.7 percent at two microns. At normal operating
RPMs the EaBP Filter will filter all of the oil in a typical five quart sump in less than 10 minutes.

Superior Construction
The superior construction of AMSOIL EaBP Filters provides better sealing and increased
longevity along with superior corrosion resistance. AMSOIL EaBP Filters have a marine powder
coated exterior; and their zinc-dichromate base plates increase rust protection. EaBP Filters
have a nitrile HNBR gasket and an orange silicone anti-drain valve. The two stage pleated and
layered cellulose/full synthetic media has an efficiency rating of 98.7 percent at two microns.

Longer Lasting
When used in conjunction with AMSOIL motor oil and an AMSOIL EaO or Donaldson
Endurance™ filter, the EaBP should be changed every other full-flow filter change up to
60,000 miles. When used with other brands of motor oil or full-flow filters, the EaBP Filter
should be changed every other full-flow filter change. AMSOIL recommends using oil analysis
when extending oil drain intervals.

Increased Oil Capacity
The increased fluid system capacity and filtration life provides improved oil cooling and
ensures that equipment constantly runs on clean oil. Engine efficiency is increased, providing
extended engine life.

Soot Removal
AMSOIL has designed a high-efficiency by-pass filter element that is also a soot removal
device. AMSOIL Ea By-Pass Filters use a synthetic/cellulose sandwiched media. The inner
layer of the element is composed of a highly efficient cellulose media covered with a full
synthetic media outer layer. These filters remove 39 percent of soot contaminants less than
one micron. Soot removal efficiency increases approximately 10 to 14 percent when the EaBP
Filter is used in conjunction with a standard full-flow filter.

By-Pass Filtration Benefits

• Dramatically Extended Drain Intervals
• Improved Oil Cooling
• Increased Filtration Capacity and Life
• Increased Fluid System Capacity
• Efficient Small Particle and Soot Removal
• Significantly Extended Engine Life
• Equipment Constantly Runs on Clean Oil
• Increased Engine Efficiency
• Remove Particles Less Than One Micro

Dual Remote Filter System
The AMSOIL Dual Remote Oil Filtration System converts an engine’s full-flow oil filter system
into a full-flow/by-pass oil filtration system by attaching an AMSOIL Full-Flow Oil Filter and
AMSOIL Spin-On By-Pass Oil Filter onto a remote mount. The Dual Remote System provides
superior filtration efficiency, increased oil capacity and improved oil filtration accessibility. See
the G1092 brochure for more info on the Dual Remote Filtration System.
Typical Installation Diagram for BMK23, BMK25, BMK26 and BMK27 Kits.
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All Service Oil
877-ALL-OILS                         sales@allserviceoil.com
Ford 6.0L/6.4L Power Stroke™ Diesels
To ease installation of the BMK21 on 2003 and later model Ford pickups equipped with the 6.0
L and 6.4L Power Stroke™ diesel engines, AMSOIL offers the new Aluminum Billet Oil Filter
Cap (BK1101), the Aluminum Billet Oil Fill Cap (BK1102) and the 90-degree JIC Elbow (BP242,
two recommended) (all sold separately). These new high-quality billet aluminum caps replace
the original equipment manufacturer (OEM) filter cap and oil fill cap. The new caps have holes
tapped in them that accept the JIC elbows for hose connectors.

Dodge 5.9L/6.7L Cummins Diesels
To ease installation of the BMK21 in later model Dodge pickups equipped with the 5.9L and 6.7
L Cummins diesel engine, AMSOIL offers the 1/8" NPT - 1/4" JIC fitting (BP241), the Aluminum
Billet Oil Fill Cap for Dodge 5.9L Cummins diesels (BK1301), for 6.7L Cummins engines use
(BK1302), and the 90-degree JIC Elbow (BP242) (all sold separately). The BP241 fits onto the
existing plug on top of the OEM full-flow filter mount, and the addition of the BK1301 eases the
installation of the oil return line.

General Motors 6.6L Duramax Diesels
To provide GM Duramax owners the same ease of installing the BMK21, AMSOIL is now
offering an oil filter “Sandwich” adapter (BK1201).

The Sandwich adapter is an anodized billet aluminum adapter that screws on to the present full
flow oil filter nipple located on the engine block. The full flow filter is then simply spun on to the
adapter. The Sandwich adapter has an orifice to provide high-pressure oil feed for the BMK21.
Like the other diesel applications, AMSOIL now offers an Aluminum Billet Oil Filler Cap for
(BK1202) to ease the installation of the oil flow from the BMK11 back to the engine. To
complete an installation, the following components must be purchased separately:

1. Aluminum oil filter Sandwich Adapter with o-ring (BK1201)
2. Aluminum Billet Oil Filler Cap for GM Duramax (BK1202)
3. Two 90 degree JIC Elbows (BP242)
4. Single Remote By-pass system (BMK21)
5. By-pass filter (EaBP90, EaBP100, or EaBP110, as space dictates) (all sold separately)
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