B16a would need a lot of mods and work to make same Hp and torque as a B18cR...
Dude only 1 way to find out what u need to do to get 13s and this take it to the track as it is now and come let us know what ur best time is...
Ur asking what to do to crack 13s but no one knows what u can pull with this car as it is...
If the best U can do is 16s as it is now then you will be spending $$$ to get 3 secs.
what if ur a hot driver and pull 14.5 then it wouldnt take much more to get u 13s..
Understand what i mean... u gotta know where u at now so ppl have a good idea of what ur car and u need to pull the times u want...

Were here to help each other not Flame ppl just cause their opinion seems stupid to u..