first, need to know what kind of power / torque you will be putting out.
Exedy Stage 1, usually under 300 WHP, is fine, using organic disc.
Exedy Stage 2 are pulk, thin/ thick, but hold about the same power. More harsh on the pedal feel, hold a big more power.
Exedy Stage 3, which we call hyper single, comes with flywheel. Better then stage 2, also much more expensive.
Exedy also released OEM clutch replacement (less power than stage 1), but I think only for the US market.
Some Spec for you (4AFE)
http://www.exedyusa.com/race/Clutch_Specifications
Stage 1 - Exedy Part # 16804C
Disc Outer Diameter 200mm
Spline Teeth / Major Diameter 21T / 24.1mm
EXEDY organic racing clutches only use premium friction materials that are resistant to slippage and burst. Increased clamp loads give the necessary capacity to handle modified engines. This is the preferred clutch for street and light horsepower track use. Driveability is similar to the stock clutch. Pedal efforts will be slightly higher because of the higher clamp loads. All of our clutch discs have spring center dampers to reduce drivetrain shock.
Exedy Stage 2 - Exedy Part #16954c
Thin / Thick Thick
Disc Outer Diameter 200mm
Spline Teeth / Major Diameter 21T / 24.1mm
EXEDY cerametallic clutches are designed to handle the abuse of high powered modified engines. Our cerametallic friction material can handle much more slippage than stock type disc assemblies without slipping and fading. All cerametallic discs feature spring center dampers to reduce impact and shock loads.
We offer two types of cerametallic discs:
* Normal Thickness (Thick)
* Reduced Thickness (Thin)
Normal thickness discs have greater heat capacity and therefore better durability in demanding applications such as all wheel drive.
Reduced thickness discs offer greatly reduced inertia to improve shift efforts and improve synchro durability. These discs are approximately 1/2 the thickness of a stock disc and are recommended for track use only.