86 sport coupe, I was going to replace my radiator air deflector, when I checked on ordering it, the one displayed was not what I have. Went to GM dealer and looked at diagram of front clip parts. My car has a gm part #14090346, air deflector extension. I do not have a radiator lower air deflector part#14083929. I looked at a 87 camaro which has the lower air deflector but not the extension like I have. QUESTION: the diagram would suggest that I should have both, should I or is it one or the other. Just from looking it appears that you cannot bolt on both. The lower air deflector appears it would allow more air to the radiator.

Thanks for any advice.