rob if your thinking of spending that sort of money i'd get myself a zetec instead as theres no need to use them products unless your after serious power and the zetec makes and handles the power better otherwise just buy rods as the pistons can handle 300 anyway just my 2p worth as i got my lot cheap 350 for both but if i had of been paying the sort of money being mentioned i'd go zetec which i will be next season as the power is great