Only when they leave the factory Once messr,s Litchfield & Powerstation have worked there magic NO PROBLEM!!
I have had 6 Impreza's in the last 7 years, 4 being Imports and Lived on the Isle of Man where I can assure you constant high speeds are normal (road,weather,traffic conditions allowing of course) due to it being the only other place in Europe with NO upper speed limit.
That includes 10,000 miles across Europe as well to Catalunya,Corsica & Crete on several occasions
Only problem I ever had was self inflicted when I broke the rear screen at 160 Mph down the Ballamodha straight (Before the new speed limit, as yes there are some on the Island but a great deal is de-limited) when my Mag Mount Ariel let go.
RB Simon can vouch for the speed of that Classic as I was trying to keep up with him earlier in the same place with his then Scooby, an Ex Richard Burns RB5
Ta Ta
Richard
Chiang Mai