if u r in karachi then this is the number from where u could get the stuff
Optimum Motor Sports
tel : 021-5868451
the wires are 10.8 mm (no difference in 10.8 or 10.2) u may buy 10.2mm also
as i told earlier u will feel the difference after upgrading the same but feel the FULL difference after doing the headers and down piping.
hope this helps.