Would you believe it???

[zxocmars]

Originally Posted by 30psi

You said one was dual grooved Mk1 S12 is single vee, mk2 S12 is multi vee

23100-35f10 is S13
23100-D4410 is B12,N13,T12,T72

I have both of these alternators, and neither are V shaped. The pulleys about twice as wide as the V with 5 or 6 grooves across it, so would fit a wider/flatter belt.

I have a new one with dual-V for the wedge shaped belt.