I‘m have a G35 sedan in I want to put hks exhaust tips instead of the whole system will I still get race car sound from just the exhaust tips
The exhaust tips are exactly what they sound like they are simply tips of the exhaust after the muffler, they don't really produce any extra sound or change in sound unless they are angled in a certain direction, nor will you get any extra horsepower or performance gains. You really need a whole free flowing exhaust system for maximum performance and sound gains, but you could just put different muffler on with the exhaust tip pointed downward to deepen the sound a bit along with a louder exhaust due to a freer flowing exhaust.
No you will not. There will be little if any difference in sound.