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Just like the Title says I have a K & N Typhoon Intake for sale for the IS350. It was on mine before I traded it. You will love the intake....it sounds great and def will add performance. Now the filter is pretty tired so for about $50.00 you can have a brand new one. The intake has nothing wrong with it. It needs to be polished a bit but nothing mechanically wrong at all. Here is a chance to add an intake for a lot less than what you would pay for a new one. I would paint it Black or F Sport Blue or something.
You can get one at the Auto parts store....no big deal. I found some online at Autoanything.com for $37.50 that are replacements for k&N. Just Google it and you will have many selections