dont even use kn filter on a 1/1 car, sucks heaps of sand in.

X2 on this. Cummins, for one, actually came out with service bulliten warnings about K&N and a couple other of the "cheaper" filter manufactures in regards to their particulate bypass counts. Its particularly important on motors that run turbo's or chargers to keep that air as clean as you possibly can. I do a white glove test on my turbo inlet every time I clean my filter to make sure its working correctly.

In my opinion, if you want airflow, increase surface area (of the filter).

You can only properly filter something so fast, so if you are getting a dramatic increase in airflow from the same amount of surface area, chances are you are letting more than extra air through.

As mentioned before, even more important with force induction vehicles. The stock filter on my brother's Evo 8 is much much larger than the stock filter was on my G35 (given, I have an aftermarket cool air intake now, but thats a different topic).


If you want more airflow for your engine, just use a 1/8 buggy filter. They are enough for .28 sized big blocks, they will be plenty for anything smaller.

I just deleted all the posts which violated forum rules.

Thank you sir! Now this thread can RIP once again...

Very appreciated BRIAN G