I went to numerous websites re correct speaker size for 1991 Accord EX. There was a "consensus" that the rears were 6.5" and the front door 5.25 in. I purchased Polk's based on this info and was shocked to see speakers in door were 4". I should have pulled the rear speakers to look at them as this takes only 5 minutes but didn't bother based on info given by Crutchfield, Polk Audio and other sites. I am now gonna have to pay shipping and wait for return auth to get correct speakers. A local dealer has infinity 4012i reference on sale for 39.95. How would they compare to the Polk 4" speakers? Are infinity's ok for the $? Thanks for all replies.