How can l make my G35 sedan sound better without putting any upgrades on it. l heard you take off something from the engine and it sounds like a turbo. please help.

a g35, are u fuckin' kidding me?
if u have the 2003-2006 model year, it sounds perfectly fine.
just so you know, Infiniti got 13 engineers to fine tune the exhaust of the g35 sedan and coupe.
its one of the best sounds coming out of any car in its class.

u can get a different exhaust, go to tirerack.com
but u can f- up the sound so something thats broken.

sound is purely subjective - some like the louder exhaust and other hate it. Some like to hear more intake noise with a cold air intake, others don't. All you can do is try things for yourself or ask around to find what sounds best to you.