Why bother asking for advice if you're not willing to listen to it?
Major_Crispy said:
this is why im asking for a list of things i need to make it hit 600hp and handle it safely and reliably
Let us put this to bed: 600whp / Reliable / Subaru. That will NOT happen. Regardless of budget, it's not feasible in what is currently offered by Subaru. Not even the STI will be reliable at that power level.
No one is going to waste their time because you can't afford it. If you could've afforded it, you'd have bought a newer STI, which would be a better starting point, and have a reliable DD in the driveway for when (not if) the car breaks.
If you think you can afford it, you need to sell your twelve or thirteen year-old WRX and buy a 2015+ STI before considering this type of build; you'll start with a better transmission, engine / engine management, suspension, chassis rigidity, and steering.
5M/T has better gearing than 6M/T? A working 6M/T will be faster than a blown 5M/T (even with upgraded gears, 600whp will produce enough torque to blow 5M/Ts); there's a reason the big HP cars all run the 6M/T.
As said, you're looking at $20K+ on a vehicle that has a NADA value of $6-7K on the open market. Unless you are independently wealthy, you'd be a moron for spending that amount. You will never get your money back; builds like this aren't "investments" (it's like lying on your back and pissing in the air). There are a ton of vehicles for sale with big builds for high dollars that sit for months because no one wants to buy your half-assed project car you're listing when you run out of funds and it's still having problems. You have to understand that you're not increasing the value of your car, you are decreasing it, and need to be in a financial position to afford that. Most buyers are going to finance a car; lending institutions aren't going to give more money than the vehicle is worth. You'll likely need to find a cash buyer, and good luck with that if you don't own a shop with proven results.
What happens if you crash the car? Are you going to carry coverage for the additional $20K+ in parts on the car or would you eat the cost to replace? Even if you did have coverage for the additional modifications, 600whp would make your car illegal on any public roadway (no way you're getting there with the three factory catalytic converters); the insurance company has an "out", they'll deny your claim, and you're left SOL.
Major_Crispy said:
and i dont make 170hp? I make like 240....
You used "whp" in your original post, so responses have been used accordingly. Unless you're being disingenuous about the modifications of the car, you're making NOWHERE NEAR 240. A catback adds basically no power on an otherwise stock vehicle. On a 600whp vehicle, you can make ~15whp on pump gas by bypassing the CBE with a cutout (READ: your exhaust isn't a restriction). Your Borla Hush is not giving you anything but a slightly louder exhaust note.
Enjoy your car for what it is: upgrade it to StageII, replace all mount/bushings (they're wear items anyway), upgrade to a quality strut/spring or coilover setup (the Teins you have are garbage), and sell it to a high school / college student when you've had your fun.