FocusCanada Forums

Hi every one
I would like to know if it's better to replace the spark plugs with the stock ones or an after market plug would do ?
If so, what brand and part number would you recommand ?
Thanks

Speaking in terms of Ford vehicles.....

Ford cars like the factory plugs, I like them too, but i have found that high end plugs like bosch platinum or whatever just don't work as good, hesitate or don't run as smooth as the for motrocraft platinum or coppers. The svt has special plug from the regular focus Ford Motorcraft # AYFS 092 FECF4 at a price of $16.43 each