Hi guys,im sorry about asking too much stuff, because i don't know anything about modding.
which intake should i get for my IS250 AWD?

K&N - Short ram intake with heatshield (sucks in hot air) sounds good
Injen - Short ram intake with velocity stack (sucks in hot air) sound good
Joe-Z - Intake pipe with factory box (best performance) quiter than short ram but louder than stock
F-Sport - Intake pipe with factory box and extra hole in the box (costs alot but its from lexus itself)

I personally have a K&N and wouldn't trade it up because my car is slow anyways and i love to sound combined with my Tanabe, its all just a matter of what your looking for

i think the sound of F-sport are great, for joe-z how is the sound of it? and what do you mean by sucks in hot air for K&N and injen? can you tell me how much for those?

i only hear good things about the joe-z but i am younger so i do prefer a louder sound personally, short ram intakes have the filter in the engine bay so it sucks in the hot air from the engine, the k&n heatshield helps this but it isn't fully enclosed (afe's heatshield is more enclosed) currently there are no cold air intakes for our car, the short rams can be found for around $250 new (although u barely get any gains from a short ram to me the car feels faster than stock on a cool day and slower than stock during a hot day)