well.. this is what i did to my auto tranny vios 1.5 (1nzfe)
Blitz 6" Open Pod with CAI directly blows in (but throttle body tends to dirty fast)
TRD extractor (replica)
S-Flow Muffler (like those Mugen Twin Loop)
Walbro 255lph fuel pump
Hot Inazma Type MR
TRD 71degree thermostat
Piggyback aka CAMCON to tune the AFR and VVTI timing
D2 coilover (a stiffer suspension can attribute some pickup.. keke.. heard some sifu said b4 but most likely just little effect)
15" Enkei JS+M Japan Rim with 195/50 tyre (around 5.5KG per rim)
After dyno tune everything.. the pickup is good and better than stock car
Hope this helps.