hi i have a uk w reg impreza when im doing around 60 and put foot to floor car will start to boost around 3500 revs then starts to sound like hunting drop in power then building up again but stilll increasing in speed when i only slightly put foot down car seems to boost ok any ideas totally standard

 

Clutch slipppng?

 

clutch same proble with mine mate

 

100percent clutch mate had same problem i got a new one fitted for 477 pound