Jfsram

I have an underdrive crank pulley and was not sure of the alt or water pump pulley.

The alt failed on my car. Bought a replacement and before I replaced it I was surprised to find the new store bought one to have a bigger pulley. I was expecting the new one to be smaller.

It's 1.93" across the peaks of the belt grooves.

Is that stock replacement?
What is the diameter for underdrive set up?

raven_ghostwolf

I have 3 different pullies 2 factory and one unknown

E6DF-10A352-1-2A = 2.11"

E7AF-10A352-AA = 1.86"

last one only stamped with 257 = 2.15" this is the one I am using