what else can i do without adding a turbo or swap

[slidewaysftw]

1993 240sx hatchback my first car, mods in past 5 months

HKS hi power exhaust
Megan test pipe
K and N air intake
Nismo coilovers
NGK spark plug wires
NGK spark plugs
Drilled slotted rotors
Creamic brake pads
New calipers
Synthetic oil
Front and rear strut bar
Aftermarket steering wheel
nismo Shift knob
nismo oil cap
nismo radiator cap
Silicone hoses 3 ply
Projector headlights
Hid 12000k
Full type x body kit
Kouki wing
1 year old paintjob
Gutted interior
Lowered 2 inches
17 inch rims
Low profile tires

what else can i do without swapping the engine or bolt on i heard you can remove stuff that you dont need whar are they?

[PapaSmurf2k3]

You can remove your AIV. It wont really give you a performance increase but it should clean up your engine bay a bit. Same with the charcoal canister if you don't have any emissions testing there.

For performance, you could get an ECU tune, swap to a limited slip rear diff, maybe go to a 1 piece driveshaft, etc.

[slidewaysftw]

im gonna search up hows to remove those two things i quess next summer i will be doing lsd and ecu tune thanks