i Saw your message on my thread but i did not reply on purpose. The sole reason for that was i do not really promote underage driving, let alone modifying and speeding (Yes, 170KPH is speeding). But since you sent a nice pm asking for advice, I think i should add a few things, I am sorry if i am comming across as rude right now. as for the upgrades I have mentioned in my thread that the parts have been purchased from Optimum, Please do note that having stage 1 upgrades in your car does not really mean you can race it. it just pulls a little more performance out of the stock setup. so Yes, i do not race my car. I beleive, if you have all the power in the world under the hood and not a good enough suspension to hold it together, it is not worth it.
Now since you asked for my advice, i think i can give you some on the looks, here it is. get the denting done after that you have got the basics. now go for some nice rims and tyres. if you go for low profile ones they will not look good if the car is at its normal height, so you would need to lower the car. if you go that route you can get maxspeed springs for 6k. Although its important that you have good struts (Shocks) because if not .. your car will jump a lot and would cause harm ... now you can go for after market performance shocks i have tried tokico adjustables gas shocks (The white ones) and they are pretty good, but expensive.
I always get the rims first because i beleive rims dictate how the rest of the car should be modified to make it look good, but good 17 and then good yokohamas would cost a decent amount. So if i had your budget .. i would just get 17s and the springs to lower the car ... if i needed shocks i will get that as well ... and if i have any amount of money left i will take it from there, but thats just me.
And please do not speed, always drive in your lane and be careful!!