Originally Posted by RonMaiden
Can't you just extend the hose with another piece of hose like a splice? I like the red and want to keep it.
You can modify the hose to work in the new wing with the original lamp however the original lamp won't spray the rear window properly as the nozzle on the stock lamp is closer to the edge of the lamp than it is on the ST lamp.
So when you spray the rear window it sprays past the wiper and then the wiper does not turn on until you've sufficiently wet the glass, where as it used to turn on right away.
Perhaps the red lamp from the base ST or the black pack with the 3d carbon wing would have the nozzle also moved to compensate for the longer wing.
The stock lamp physically works with the spoiler, and it only matters if you want the washer to work properly and spray the glass rather than the bumper cover.