right whats the difference between the early 105bhp zetecs and the later 115bhp engine? is it jus the afm?

 

not to sure, but the differance between the 105bhp and the 130 is..

Cams, Ecu, Inlet, maf, oil spray jets in bottom end.

Their is 3 types of zetec-E engines so i hazard a guess the 105 is the First Silver top, the later 115 one the 2nd and the blacktop the 3rd generation one.

Try FT.com and it will tell you all the differances of them.