What mods should I do next
 

I have a 1988 GTU with a 1987 TII swap.

Mods so far:
JDM down pipe
Removed all emishions
removed rats nest
TB mod ported and polished
upgraded VAC lines
rerouted fule lines into stock lines for charcole canister
removd charcole canistor and EGR using catch tank
MAPED ECU
3in intercooler piping
3in intake piping
FMIC
boost guage blitz BLM
Greddy type RS BOV
grounding kit
FD fule pump
revers glow guages
CF guage bezel
Sparco stearing wheel
custom exhoust "POS"
FCD
E-fan "ford tourus"
KOYO RAD
aluminum coolant hoses
steal braded lines

uhh ? can you port your lim and uim? if soo do it!

Who ported your UIM and LIM? how much? and what were the outcome benafits you got?

I dont know if its the same on an s4 na.But theres a write up in the faq in the second gen section.I followed that and i did it it made about the same difference as an intake.It was definatly noticable.Im actually going to take it back off and see if i can smooth it out more while enlarging the runners alittle.

will look into it