Actually i think Polarbear got my point completly was just wanting to know if these pully's and belts were ok just found out that the alot of rally cars run the Dayco belts opposed to genuine subaru. Was a little concerned that if i bought cheap alloy knock off's opposed to brand name such as GFB they would fail costing me big $$$ in the future

Not really concerned with the power gains but if buying the belts seperatly are going to cost me $150 + and i can buy one of these kits for around $200 and i will get a little power increase and better fuel consumption then all good