Ok so here's what I plan on doing within the next few years for my 2012 WRX. This is my daily driver and first time owning a car with a turbo so I'd like to keep it as fuel efficient as it is now but if I lose a few mpg to have the extra power, that would be fine with me but if I can gain mpg, that would be great also. I want to keep the stock turbo, unless it's recommended by alot of people to just upgrade that but for what I do with it, I don't really think I will have the need to replace it. I'm not looking for obnoxiously loud and not looking for 600 HP, maybe just to add 100 HP or so. Total budget I'm guessing would be around the $5000 area with the parts I'm thinking to put on and probably go as far as stage 2 but not any further than that. Most of the parts listed below are what I did research on and for the most part was recommended by many on this forum and NASIOC and also went by what I thought was affordable for me and personal preference. If anyone has any opinions about my setup or think a different brand of part would be better than suggested or don't think I even need some of the parts for what I'm trying to achieve, please let me know and I will take your info and keep it in mind when purchasing parts.
Here is the list:
Invidia Q300 divorced catted downpipe and cat. back exhaust (catted for inspections)
Cobb Tuning SF intake and airbox
Cobb V3 Accessport
Get rid of stock top mount intercooler and get Perrin front mount intercooler and hose kit
Cobb short throw shifter
Go Fast Bits TMS Respons Hybrid adjustable diverter valve
manual or electronic boost controller
H & R front and rear lowering springs....only lower about and inch of two
Innovate turbo timer
P.S.: I have seen the stickies about the whole bov thing and I'm not looking into what the car sounds like when I'm off shifting....the cobb intake is a good enough sound for me on its own...so my question is, what is better for power gain and throttle response....a diverter valve, recirculation valve, or bypass valve??