Stall question?
Are you comparing a SY 3500 and a SS3600?
The SY 3500 is a low STR converter designed for street tires or running 3.73s and nittos. The SS 3600 is a harder hitting all around converter.
The SY 3500 is a low STR converter designed for street tires or running 3.73s and nittos. The SS 3600 is a harder hitting all around converter.

