I've had my usdm sti spoiler on my car for around 2 months and it's just now started to leak water into my trunk, i know i've read some threads with similar issues but i can't find them. Any suggestions?

What about unbolting the spoiler and putting a small amount of weatherstripping in the joint?

yup, get those weatherstripping

thanks for the idea, i'll look into the weatherstripping.

that or get some silicon sealer and put that around the bolts. might work a little better. Thats what i used to plug the holes in my roof when i removed my roof rails and havent had any leaks in over 2 years