I'm using my truck to help experiment with the GREEN HP Air Filter, compliments of Vararam Industries (thanks Terri) and I'd say its a ton better than the factory filters. I'm on new model dodge ram #2, so parts here are a dime a dozen for the rams at my house, I had a new drop in replacement I picked up at the dealership and when I recieved my Green Filter, I put the two to a test. Held up to a shop light you can really see which one will allow for the most air to pass. The filter is washable and reuseable and comes with a LIFETIME warranty. Performance was a big increase, my truck with the factory air box was always seeming to want more air, the GREEN filter seemed to let the air come in and the truck breathes 100 % better. I must say I'm impressed with it alot over the stocker................ to Vararam Industries and the Green Filter......

 

Is this a cotton guaze type of filter? I've tried a K&N, I lost mpg and it felt like performance too. I wonder how the "green" filter is different?
Jim

 

Maybe the Ram like a little pressure inside the box for low end.

 

I have used K&N's for over 30 years and I have a few observations. From the factory K&N's are over oiled and they are very easy to over oil, which will lead to a loss of MPG and HP. Over the years however I have found that in my applications K&N style filters do not have enough filtration for me, everytime I clean a carb or throttle body after using such a filter I would find a very fine dust on the other side of the filter. So I have been looking for a High Flow filter that has better filtration, Do not get me wrong I still have K&N's on my ZX12-R and others that will have K&N coverage on those apps.
My point here is that even though the stock air filter may not flow enough for performance enthusiasts it does a great job of keeping out the dirt. I have yet to find anything that will do the same job. More Flow yes but at less efficiency.
TJ

 

I replaced the stock paper filter with a Purolator paper filter when it was dirty and I believe it does a better job. I don't know how the paper media compares for flow on the two but the Purolator filter is deeper and has more pleats which would give it a larger filtering area and a larger area to allow more air flow. Just my opinion, could be wrong.
Jim

 

No you are not wrong, anything that has a larger filtering area will flow better with the same media. Now whether or not your larger paper filter will outflow a cotton/gauze or such type filter is another matter... I would like to see flow numbers on that though....

TJ

 

The Green is 100% cotton, not gauze. K&N's have the cheap *** looking hospital gauze. K&N acutally stopped making the filters for the Cummins. I have to sell a Green or AirAid in its place at work.

 

At the Machine Shop where I work it is well known that if a Cummins, or any other long life diesel, comes in with a wore out engine @ 100,000 miles or so, it has a K&N filter in it or no filter at all ( or defective housing )...... most every time ( I am talking bore wear ).
After listening to everyone about the Green Filter I am almost sure that is what I am using at present... ain't that a kicker, not knowing what you have???

TJ

 

I remember seeing the turbine of a Strokes turbo that had K&N's in them. The fins looked like ***!!! I worked on diesels for a while and never saw a turbo as beat down before..... Except for some Garretts that were just plain trashed. Im running a Green myself with my intake. Just a better made filter when compared to a K&N.

 

TJ's post is right on. A local engineering firm did some testing a few years back on aftermarket filters ( low humidity, high dust content in air here ). The K&N and other similar style cotton gauze filters pass a lot more "dirt" than the paper style. They tested the motor oil for silicon contamination and found way more when using the gauze style.
It's a conundrum for me since replacing paper filters every 6 months is costly and I prefer the reusable design and performance gains with gauze. Guess when rebuild the motor at 100K or so I might think otherwise....