Hey y'all. Im a new member here with a 3IS. I recently picked up a 14 IS350 AWD Base model and already got a new parts on it. I did the Invidia Midpipe with the Remark Axleback. I also have the K&N filter. I am fortunate enough to live 15 minutes away from RR Racing so I will most likely go get tuned by them. I want to get as much power out of it as possible. Would it be best to cutout my cats for the most power at the moment? Or is it worth it to save up for PPE headers then get tuned? Thanks for the help in advanced!