[mustangman4]

Yeah you could bolt the throttle body straight onto the manifold but your throttle cable bracket would have no place to bolt to or less you have a cobra intake or planned on rigging it up somehow. So you need an EGR blockoff plate or EGR spacer eliminator. Found on the webpage listed below. EGR on a naturally aspirated anything will give you better fuel economy and thats about it also effects NOx levels(emmisions) Its job would be to recirculate exhaust gases to be burnt again. It does a pretty good job. BUT when you start getting a little bit quicker and start to tune the car yourself and maybe take it to the dyno and drag race on the weekend and take the car out on road courses it can start to hurt you. Reburning exhaust has a drawback. It creates a lean condition. Lean is very bad or less you can tune around it. An old theory was at WOT for about 13 to 15 seconds a factory Ford processor would activate the EGR for emmsion reasons because at that point you are just dumping fuel in and could reburn it. Well that is what we do with mustangs we take them down the track for 10-15 seconds at a crack in the quarter mile. When it turns EGR on and the motor goes lean watch out especially in supercharged applications. That is where a tuning device comes in handy because you can actually watch the oxygen sensors go lean at some point. All in all stock trim mustang dont even bother, highly tuned and modified maybe want to clean up the engine compt yeah go for it.


http://www.uprproducts.com/shopping/...ucts.asp?id=77