That foam filter he's got on his 6s has some kind of frame to it; that black webbing on the outside. I had a foam filter that had virtually no support whatsoever. It gave the same air flow as the stock panel/air box set up. The foam filter came apart and was almost sucked into my engine. I have run the same K&N filter for 3 years. I have serviced it 1 time; I know it's probably due for another. I pulled it off last weekend to mess around with my battery and cables. The intake plenum is dry as a bone (no oil from the filter) but the filter's insides still have some oil. The intake plenum was also completely clean. There wasn't a speck of anything from the MAF to the throttle body. There's nothing wrong with K&N, nor is there anything wrong with a foam filter with some kind of support.
