Which conversion bits exactly? I dont have any at the moment, and havn't decided were to get them from yet? Any suggestions?

Also i have a set of injectors which i got very cheap but thiers not much info on them. They are bosch fuel injectors, and the part number is 0280150749. I looked them up on the net and it says their for a SAAB/Volvo?

Could anyone tell me if they wil be ok, as i'm not sure if the resistance wil be right, or if they will be big enough for 250bhp?

Any help would be great,
Thanks