It is possible.........I always thought they were the exact same tips as the TL-S, or at least they look darn close. A guy down the street has a base RSX, and from the RSX-S's I've seen, they look the same, but I could be wrong. I know for a fact that the tips are the same between the Tl/Tl-s, so I'm just assuming acura did the same with the RSX.

Edit.....I walked down the street with a measuring tape (lol--I was bored), they are the same size as the TL-S tips, actually they look like the exact same part. If there is a difference, I sure couldn't tell, but they had the same dimensions.