DOES ANYONE KNOW IF A TURBO OR SUPERCHARGE KIT EXIST FOR THE IS350 ?

They have S/C kits out there - both in production and out of. LMS kit - it's discontinued, but you still might be able to piece together the necessary parts. Tom's - it's still sold, but horrible bang for your buck - $11,000 just for the kit itself. Not to mention, the ECU reflash requires a JDM ECU. Turbos do not exist right now. Turbochargers.com were building one together, but yeah... Long story short - it didn't happen and caused a lot of drama and angry Lexus owners. As of right now, Elite Autosport (the company that helped retune some of the TT IS-F's that were botched) is looking for a test car to fabricate a single turbo kit. No one will step up to it because of the previous scare and skepticism. If you want more information, go to clublexus.com.

Thanks Eric ! I would like your opinion . Do you think the ISF is a good buy for performance vs the IS350 ? bang for buck ? I am deciding to get one of them . I have driven both and have a leased IS350 which i have to give back but it is quick 0--60 in 4.9 or less