What is the best
 

I really want to know what is the best air intake am using injen air intake.

I face some problems in cleaning the filters.

Am planning to change the air intake and am thinking to go with HKS.

So I really want an advice to take the right decision.

The most important thing is to gain more Hp.

What exactly is your problem with cleaning the filters? Gen 3 intake makes the most gains but i assume will suffer from whatever problem you have now with the injen intakes. Post MAF Tubes + drop ins makes ok gains. Most short rams may cause losses from heat soak.

The problem is to reach the air filter. I should open the front covers which is above the wheels and under the engine.

Nick911sc is correct in what he is saying!

To back that up,

The best in terms of performance are going to be either the Injen which you have, or the Stillen Gen III. The best fit will be the Injen, again your current setup.

Now any open air element in the engine compartment will heat soak. This is not the route you want to go in terms of performance! Yes, cleaning and maintenance will be easier then your current status, but that is the trade off!

K&N drop-ins help a little in the high RPM's over stock and are very affordable.

In my honest opinion stay with what you have because (overall) you have the best set up!

If you have any questions please do not hesitate to call me directly...

Thank you, Tony

What about Injen vs AEM comparison? Any input/experience?