I have an 06 wrx. I already have 06 STI struts. I was wondering if I get the STI pink springs would they work well with the sti struts and pinks even though I dont have an STI.
The springs will fit, but that won't be your problem. The 06 STi front struts will not bolt up to your stock WRX knuckles, they are designed for the larger 05+ STi knuckles. Or did you already trade out front hubs? Other than that, the STi pinks are almost exactly the same rates as stock STi springs, so if you are going to use the STi struts, just get some stock springs to go with them.
i have a set of 05 STi springs if they will fit, i honestly dont know. but if they do i will sell them cheap!
This is correct to a degree. All 5x100 setups will not work with any 05-07 STi 5x114 suspension components (this includes the struts because they bolt to the knuckle). All 2004 STi suspension components are swappable onto the WRX platform because the WRX and STi (2004) share the same bolt pattern and a similar (if not the same) hub/knuckle assembly (as I understand it). JDM STi Pinks are not the same as the USDM STi pinks, and do not share rates.
I couldn't tell if the OP had already swapped to a 5x114 setup or not, so I probably should have just explained it like you did. I neglected to mention JDM pinks, because most of the time I see people mention the pinks they are referring to the USDM ones, whose rates are like USDM stock STi springs. The JDM pinks have higher rates. USDM STi Stock: 224 195 USDM STi Pinks: 223 195 JDM pinks: 257 217