Hello guys I am new to the forum and I am the owner of an Infiniti Q50 red sport. I wanted to upgrade a few things on my car to get better performance, but since I am a novice when it comes to cars and I would prefer not to get taken advantage of. I do live in San Diego county in California so any parts I put on the car need to be Ca compliant. With that being said, I am looking to get an Infiniti sports axle back exhaust, a Stillen cold air intake (carb exempt) and a JB4 tune. I was quoted 3k with installation. I thought this price was pretty high considering the installation was only supposed to be $350. I did some research on the parts and the total came out to $1600 so if my math is correct the total should be $1950. My first question is, has anyone else added intakes, an axle exhaust, and a JB4 tune? If so how much roughly was it? Also performance wise, was it worth it? Thanks for your time in advance, Quinn.