As above, Hyperflow TMIC for new age STi. Cheers.

 

You will be very lucky to find one of these second hand, rare as hens teeth being the largest top mount available on the market! I bought mine full price with a little discount negotiated as my mate bought one also, still good value considering the hassle of a front mount, my mate is running 430 Hp with a Garrett GT30 on his Sti 8. Good luck