Well I should've stated that better.

If you have to get them, you should get hub-centric spacers. Its the regular cheap ones that can be bad for the car. You're pushing your wheels out past where the car was built for them to go. It can weaken your axles. It's like putting two buckets on a pole, if it's of decent (shorter) length, it will remain strong...however if the pole keeps getting longer and you keep putting the buckets out further and further, it's going to be weaker and start to bend...