Question about roof spoiler

Hi, I just brought a 91 mr2 N/A couple of days ago. It came with a roof lip spoiler that goes on top of the rear window. Can anyone here tell me what brand or kind of spoiler is this? It a add on piece, but it fit really perfect. If I keep this spoiler will I still be able to use the Toms roof air scoop? Or will the lip spoiler be in the way? Please help me, I dont know much about MR2. Thank You, Dan.

Have a pic? ... never heard of such a thing.