Hi might be silly question,but does anybody have any idea wot size the front and rear arb’s are on a 2008 2ltr hatchback looking to either upgrade or change bushes and need to no sizes. 

i'd leave the front alone and upgrade the rear on it, not 100% sure on the standard size on a hatch, sure somene will be along to tell you.

 

doing the rear helps with canceling some fo the understeer, so if you do both you balance it out rather than correcting it.

Just to let everyone know,I eventually used both arb’s from a wrx hatch of same year,plus polly bush’s handling and body roll vastly improved without any under/oversteer problems.