the same as my00 which from what I've learnt should be 160mm. Please correct me if this is wrong. Also does anyone own an Alpine 7894 head unit, if so what do you think, I want to get one but would like to hear peoples opinions first.

 

160, 165, 170mm speakers will fit the front doors of a 2001 Impreza. You'll need to make up mounting rings from 12mm MDF.

 

Cheers mate

 

Thats ok