Are RS turbo s2 fuel pumps the same as sierra cosworth pumps or are the sierra cosworth pumps more better. Also is the fitting the same on both pumps and also if the sierra cosworth pump is a better pump which one should i be using the 2wd or 4wd one or are they the same. Cheers

 

an OE 2wd sierra fuel pump is classed as Uprated ERST fuel pump. they fit exactly the same as the normal one too

 

cheers mate