Flex Hoses are Dayco #81391. Size is 2" x 1 3/4" x 19". These run about $25-$30 most places but I found them at Advance for $9.79 each.
Here's another picture.
If you were to find something that fit they would be too small and would choke out the motor. I install copper mesh in mine. Looks good and keeps the bugs out. Just don't follow someone on dirt roads.Stretch, I'm not running any filter currently. I've tried a few and can't find one I like with those air filter housings.
Mark
So were the hoses you replaced the same style as the accordion hoses you used this time? Could the ridges cause turbulence? Shot in the dark as you mentioned this is all you have changed.
Thanks for the info on the air filters.