I purchased and adapter and filter from gecker last year and of course I managed to loose the filter. Do yall happen to know that model number? I looked on geckers site but that was a no go.. What is the smallest I could go and still get good air flow?

Just figure out the dimensions you want and go to the k&n website. Or call Gecker, good luck with that if you've already paid for something though...

I'm surprised you didn't get a virus going to geckers site...

I didnt want to purchase anything else from them just need to figure out the smallest filter I could get away with and still get good air.

If you could get him on the phone, he'd probably tell you what filter it was. I thought he used s&b filters, but if you could get the model for s&b, it would be easy enough to cross reference.

What all did you order from him? I'm sure everyone would love to hear about your experience.

I just bought the adapter and the filter, and it arrived within 4 days. I cannot get him on the phone though. I can only comunicate with him through email and he dodged the part number question...
poker you wouldnt measure that would ya?

Filter: 8 3/8" L x 4 3/4" W x 4" D
Flange: 6 3/8" L x 2 7/8" W

As far as how small, the K&N is about the size of a softball. The Gecker is much larger than is has to be IMO. If you are gonna stick with his adapter you have no choice on filter size.

whom else offer and air adapter for the pd? I have seen some for mb, etc...

If you can get your hands on the adapter for the old donaldson set up, you can mount a smaller filter right on it. Chops has a fancier set up that comes with the adapter and filter. I'm sure there is other places to get them too...

The MB is for a Mikuni carb so it wont fit a stock carb.

This is the thing I was talking about that chops had...

viewtopic.php?f=64&t=10751&p=117176&hilit=stock+filter+adapter#p117176