PTC 9.5 NLLU Converter

[ds4545]

The PTC 9.5 LU converter seems to be one of the most recommended converters. Can someone explain the performance difference in the 9.5

 

[chikn305]

I put a PTC in mine car over my old 9.5 and went from 1.49 60fts to 1.3's and picked up .4 and 7mph in the 1/8 mi. These converters are worth every penny.