My 98 is still rinning on stock stuff
I can tell that it is losing a little compresion
but is still runs verry strong
How long till your first rebuild?
My stock 98 shee has never had a bolt turned on it not even a jet
It still runs great and can run with a piped raptor
I aint touching it till it goes boom
Your poll is trickey
it depends on what kind of riding you do
K&N will flow better but you need the outer where in the sand
the foam will work better in sand with out outer where