[2.2 Straight six]

hey, it's your money. if you want to spend $10k then go for it. your budget is the limiting and deciding factor. i just think that's it's a lot of money to spend on a road car. if you were building a car purely for track racing then it's a good budget.

don't forget driveablility is going out the window with 500bhp. especially in a front-wheel drive car. a 500bhp VQ35 will make a decent amount of troque (420lb/ft upwards) and hard acceleration would shake the wheel out of your hands.

best options is probably that turbo kit i posted, under $6,500. 350bhp, 386lb/ft. and it includes everything.

if you wanted to go for 500bhp after installing that kit, there wouldn't be too much to add.