I have a 2007 hawk wrx its de cated turbo back and has up rated panel filter. My question is if i fit the vf 43 from the sti can i flash map the stock hawk sti map to the car or are the differences too great. Thank you.

 

no it will brick the ECU and also the differences are too great. Best to get your setup mapped as the STI and WRX 2.5's are quite different for timing you've more chance of blowing a whole in one of the pistons.