Fully
re-useable foam air filters
If
you want to improve engine performance and economy, reduce
engine wear and increase engine life then you need a Unifilter
from 4WD Systems.
Unifilter
uses an open cell foam which is 3-5% product and 95-97%
void space. This open cell structure allows air to be pulled
through the foam with 40-60% less effort than conventional
paper filters. Sticky filter oil (Filter Fix) which
is applied to the filter foam catches all dust particles
above 4 or 5 micron. Standard paper filters allow particles
of 35 microns or smaller to pass into the motor.
The advantage does not finish there - Unifilter
elements are re-useable - at around the normal life of a
paper cleaner, Unifilter
elements can be washed out with minerals turpemntine, re-oiled
with "Filter Fix"
and returned to the vehicle. Economically and environmentally
- a great concept!

Comparison
with paper air filter elements.
| Criteria |
Paper |
Unifilter |
Summary |
| Air
flow |
Fairly
restrictive |
40-60%
less restriction |
Better
economy & performance |
| Dust
retention |
35-40
micron |
4-5
micron |
Increased
engine life |
| Cost |
Aftermarket
- cheap
Genuine - $$$ |
Between
$50 -$70 |
Save
$$ by washing & re-using Unifilter |
| Life
expectancy |
10-20000
km |
Life
of vehicle |
Cheaper
long term |
|