Ok, all over all the threads you hear about putting to much power through the transmission. We all have to face the fact that the WRX has a horrible transmission. You also hear about the vaunted 6sp STI transmissions. I got some questions about all this.
1) How much power can the stock WRX transmission take?

2) More specifically, I plan on running Turbo XS Stage 3 with a front mount intercooler, the biggest injectors i can find, the biggest fuel pump I can find, and an XS enginering Garret 450 hp or 500 hp turbo. Can the stock handle that and do i ned anything else?

3) Is the STI transmission the end-all be all? Or are there better transmissions out there I could buy and the only reason people on this forum love the STI one is because it's Subaru?

4) With the setup I mentioned in question 2, what do you think my quarter mile times will me? Just wondreing.

 

pshhh a cage, i'd get one if they didn't get in the way of head space and look stupid. I know that makes me sound like a dumb kid, but it's true. I wanna be able to go fast, doens't mean i'm gonna go fast all the time, but I also wanna look pimp.

 

subbaru_wrx if you are still interested on what your 1/4 mile times will be like here it is:

260HP
At the Drag Strip…
0-60mph: 4.7-4.9 seconds
¼ Mile: 13.4-13.8 seconds @ 96-98 mph

280HP-285HP
At the Drag Strip…
0-60mph: 4.5-4.7 seconds
¼ Mile: 13.2-13.6 seconds @ 98-100 mph

300HP-310HP
At the Drag Strip…
0-60mph: TBA
¼ Mile: 12.9-13.3 seconds @ 99-102

340HP-350HP
At the Drag Strip…
0-60mph: 4.2-4.4 seconds
¼ Mile: 12.4-12.7 seconds @ 105-108 mph

So if you are planning on having approximately 500+, then you should be in the mid to low 11's.

For example, Import Racer Magazine did a test on a 740HP WRX and here was it's times:

1/4 Mile: 10.73 seconds @ 135 mph

Hope this helps.
740HP WRX :) :) :)