there are 2 type f and d which is for the s2000 and if its both which i think it is whats the diffrence between them

 

You want the one that is pressurized at 1.35 [vs. 1.1 stock and 1.3 Mugen]

 

all it says is type f or d how should i know

 

Ask whomever you are buying it from. It has the number on the cap.

 

spoonsports.us

 

is there any observable benefit(s)?
YES i have read all of the previous thread and saw so many theories but I want real hard fact

 

they are both 1.35 pressurized. i believe you want the type f. the type d wont fit in our radiators??? i think??? PM speeding, he would know.

the benefit is basically at a higher pressure, it takes a higher temperature to make the coolant boil. boiling coolant isnt a good thing.