What is the biggest possible tire to fit on a g35?

 

dude there's no way z1 told you 550whp and 450trq on bolt ons, they told you thats as much as the stock engine could take when you use FI without blowing a piston to Mars, and thats the very maximum power which will prob be a fried motor at 15k miles. 450-500whp 400trq is the safe numbers. Do as you wish tho but bolt ons aint gonna get you no where near those numbers...

 

How do you remove speed limiter on a 2007 g35?