Is there anyone that still makes a 3 inch exhaust for the is300? I was trying to find an srt but they seem to be long gone.

 

Check SRT's Facebook page and message them. I just did a custom 3 inch cat back. Removed the muffler and swapped the resonator with a VIBRANT Performance resonator. Love the sound, and only cost me $300 total compared to the crazy price of the SRT