My friend gave me his old egr system off his 99 WS6 cuz it had the egr mod already done to it and he gave me his old maf it was descreened so i put it on,are these parts different from my 98.

 

Should all be the same.

 

The reason I ask is because my car seems so underpowered lately,and im trying to figure out whats wrong with it,it smokes alot under a load i think thats bcuz of the orp,is there something that needs replaced that could hinder performance?