Yes you do. You can probably make it work with the STI but you have to have a way of making the fuel rail fit. With the wrx unit, you just need to buy the WRX fuel rail
you need the wrx fuel rail, top feed injectors, wrx tgv housings and depending on what size injectors you might need injector clips. that would be the "conversion" kit
I can sell you some jdm spec-c tgv topfeed deletes.... let me know... also I have got helix 800 cc topfeeds
bring your sti tgvs by and we can just trade straight up for some topfeed wrx ones. we have about 30 sets of wrx tgvs in stock. Justin
Actually you can still use the STI TGV's. I remember now. We ordered the Ultimate racing kit but didn't wanna use their fuel rail so we decided to get some WRX ones. I believe I still have the ultimate racing rails.
Oh thank god! I was going to order P&L's 1000cc Top Feed Conversion kit & just thought about it that it wouldn't make sense to sell a conversion kit if it didn't work. BTW that's $800!! But if I trade my STi TGV's for WRX's and buy wrx fuel rails & injectors is it cheaper? Hmmm.........