i, as a fellow MY98 owner, had the same problem... and i picked up a used JCS j-tube from another 98 owner who had recently wrecked his in bad weather... so i contacted larry ganz.. and he pretty much spelled everything out for me as to what i needed and how much it would cost... here is the list...
(1) a PRM filter www.SubaruPlanet.com/product2.htm#prmfilter
for $139.95 + $10.95 S&H to have drop shipped to you from my supplier (also in the note specify silicone color)
(2) order the kartboy MAF adapter
which ships from me $35.95 + $6.95 S&H
(3) order a stage II upgrade for the MY00 intake
for $49.95 shipped - having seen you order a PRM filter and MAF adapter I will know to substitute a 45 degree bend instead of the 90, plus add a 3x3 connector to cover the bend where it enters the fender and include an extra piece of 14" long hose (to split down one side and pinch onto the edges of the hole in the inner fender to keep it tight qand not rattle.)
larry is great to work with, and very helpful...
all in all... it took me a day to install everything... and it sounds awesome... the car really growled from the front end at WOT... of course with the header back exhaust system now... the ENTIRE car sounds good... :biggest:
i'll post a link to the pics i took during the install once ImageStation stops being a beotch...