So I have an idea on what they do but can someone explain it to me a lil more clearly? They are a cooling mod but is it pointless if I just bought the cap and nothing else? Would it affect anything in my s2k in a badway with just the cap installed?

thanks!

 

probably gives 1hp at best but i don't notice any problems
with just the cap installed
plus never drive a long time in hot weather so i don't know

 

Click HERE for your answers.

 

thanks for the info.
I guess a radiator cap won't do anything since I use normal anti freeze

 

thanks for the link purp