Have a read of this:
This is what we recommend for a good setup to extract more power from your engine:
Here you go, this is a basic overview on how to get a well balanced setup with brakes and chassis to match:
• Free Flow Mild Steel Manifold
• Wrap Manifold/Decat in Heat Wrap
• Decat
• Cat Back system - (some cars need to use S-Flow)
The car is now expelling gases more efficiently.
• Relocated Air Filter to front bumper (use free flow air filter)
• Reduce Intake length
• Heat Reflective tape for Inlet Track
Car is now breathing more efficiently
• Front Mounted Intercooler for turbo engine
• Uprated Thermostat
• Rad Cap
• Consider better radiator and breather/header tank if planning on track days
• Consider Oil Cooler WITH thermostat if planning on track days
Car is now cooling more efficiently
• New Spark Plugs (consider colder grades 7,8)
• New HT leads
• Inspect Dizzy/Cap/Rotor
Ignition system now works
• Uprated Fuel Pump
• Fuel Pressure Regulator Kit
• Engine Management/Piggy Back/Fuel Controller (depends on needs)
• Rolling Road Session
Car now fuelling adequately
• Uprated clutch with flywheel is poss
• Quickshift Kit
• LSD if poss
Car can now handle power and you can shift quicker
This then leaves the brakes and chassis which will need to be sorted to cope with the power. We would recommend at a min:
• Uprated Front Disks
• Uprated Pads
• New OEM Rear Pads
• Braided Brake Lines
• Cusco BMCS
• Dot 5.1 Toyota Fluid (bleed dry and refill)
You can now stop!
• Coilovers / Fixed height shocks with springs
• Front and Rear Strut Braces
• Panhard Rod
• Lower Arm Bar
• Anitlift kit
• Check and replace worn bushes
• Good tires
Power to ground greatly improved.
That’s a basic list of what we recommend, obviously there are many more parts that will net you a good handling car that can stop with power to match but that should give you a good idea on where to take her pending needs.
This doesn't take into account basic servicing which is a must, make the most out of what you have no point adding mods until the car is up to scratch.