how can i tell if my opti is vented or non vented.i have a 94 chevy caprice with the lt1 and my opti went out.well heres the deal,my friend has a 94 trans am with a lt1 and he just bought a msd opti and he said i could have his old 1.works fine but will it fit on my car.

 

Vented optis have an outlet at the bottom of the opti and a hose runs from it to the elbow if I'm not mistaken

 

Vented opti: