all i wanted to no was is it as simple to do the conversion on a focus, as it is to do on the fiesta, if i wanted a st lump i would just sell my focus and buy an st170 because there cheap enough as it is, just wanted abit more power for the road so i havent got to drive the 1.6 engine so hard without spending a complete fortune, because my focus is stripped with a roll cage and bucket seats, it fairly nippy compared to the 1.6 in the first place...also wanted the puma engine so unlike the st170 lump i wouldnt have to change the brakes, suspension looms etc etc..and being 19 i cant afford insurance on a st170...if insurance wasnt so high or non exsistant i would own a cossie...just wanted bit more power without to much hassle, and insurance going to high