It doesn't work like that as far as adding all the HP together.

 

Take of the TB Spacer and see what you really get out of it. TBs are a waste of time since it only has air flowing through it. veryone said it... I didn't beleive it until I tried it. It was a paperweight until I sold it to a guy who rerouted his EGR flow and had it tuned for the spacer. After teh tune then it was worth having the TB spacer. Just my .02 cents though.