STi R-180 Ring gear stamped with 39:11 means it's a 3.54 ratio
By Kurt
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39 divided by 11 = 3.54. A 3.90 would have 39:10 stamped into the ring gear.
By Kurt
39 divided by 11 = 3.54. A 3.90 would have 39:10 stamped into the ring gear.