speaker upgrade

[hughes86]

hi guys,
got an 04 plate leon cupra tdi. Was wonderin if i needed to buy speaker adapters for the front and rear speakers, and do the 13cm speakers fit or are they bigger?

 

[Nutkin]

need adapters or better to have mdf rings made.

and they are 16.5cm

 

[hughes86]

do i need adapters for the rear speakers and are they 17cm speakers in the rear aswell?