I had them installed in one of my Z's with the TWM shifter and didn't notice any difference either. Haven't tried them with my Coolerworx shifter
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Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo
700+whp
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