The Beach Boys' 409 came out early in their career - the B side to the Surfin' Safari 45. 409 refers to a Chevrolet with a 409 cc engine. Wikipedia says it was a 6.7 litre engine - a record setting Daytona stock car. ( I appreciate the motor power; having owned a 5.9 litre beast a few years ago, I know that they rocket you from 0-60 in just a few seconds. Any time you need a little more power, it's there. But, you can literally watch the gas gauge work its way down in real time - not so cool where I live with gas at about $10/gal - still!!) In fact - a lot about the Beach Boys ain't so cool when you look in to their 60's frame of mind, but at the time, it was "surfer cool".
Take for example the lyrics themselves: nigh on 1/3 of the song is comprised of the words <409>: but that fit the times: rock beat, AM radio play...
However, the Beach Boys again and again hit the top of the charts in the mid 60s - including 1964, when (maybe not the height of their career) they came out with Fun,Fun, Fun and I Get Around.