Most competitor's performance converters come with turbine splines that have a hardness of 0. This rating is just inadequate
for the application and too often, the result .....
IMMEDIATE CONVERTER FAILURE
Precision uses hardened turbine splines, virtually eliminating a major reason for torque converter failure. 90% of the time it happens right at the starting line.
The input splines on the tranny have a hardness rating of 35 on the Rockwell scale of C; the mismatch with the 0 rating on the turbine shears the splines right off of the turbine.
Another step that the competition skips - a cost cut that will only cost you in the long run.