What should i upgrade next?

[cuddlesthesheep]

So this is what i got going on in my car as of the moment-

1990 Pignose Coupe

Exterior: Stock pop up front end / pig nose bumper
Color: Black (front end is spray painted /trunk & rear bumper)
-Rear fender pulled for wheel fitment

Interior: fully gutted de-tarred the floor
-Sparco Corza (black) driver seat w/custom rails
-Stock s13 passenger seat (gray)
-Cam Lock 4 Point Harnesses (passenger side and driver side)
-Pink Auto power bolt in 8 point roll cage (extra side bar welded on)
-C-pillar X bar in the trunk (custom made lol)
-Rear Cusco strut bar
-NRG quick release
-Personal FITTPALDI steering wheel
-No AC core/ Heater core


Engine: s13 black top sr20det
-DC sports turbo manifold
-AEM custom intake
-X S power front mount intercooler
-engine torque dampener
-Turbo XS RFL BOV
-ACT stage 2 heavy-duty clutch
-NISMO motor / tranny mounts
-Tomei short shifter
-Megan down pipe
-JDM test pipe
-NISMO exhaust
-Chipped ECU from Japan
-Circuit sport boost gauge
-No power steering
-Koyo Radiator
-Fidanza Lightweight Flywheel
-DSS 1 Piece Aluminum Driveshaft

Wiring: all wiring and fuse boxes are tucked under the dash in the glove box area & so is
The battery box so engine bay is cleared

Wheels: fronts 17x8+5 w/25mm spacer so –20 work equips (5lug)
-Rear 18x9+30 w/45mm spacer so -20 5zigen Fno1r-C (5lug)

Suspension: 5lug conversion
-Z32 brake calipers
-Brembo slotted front & rear rotors
-S14 Front Lower Control Arms
-Stainless steel front brake lines
-Tein HA Coilovers
-new JIC RUCA
-new Megan traction rods
-new Megan toe rods
-New rear ENERGY rear sway bar bushings
-new Megan solid sub frame collars
-Kaaz 2 Way LSD
-Ultra Racing fender brace
-KTS tie rod ends






What would you recommend i upgrade next for some more power, within reason!

aka like little things not a whole new turbo or an RB26

just some advice would be awesome guys