I don't know how to answer that about responsiveness due to the fact I have not driven my car in 6 months then took it to the shop to get some parts put on. If anyone with an SC Z would like a ride and then they could judge.
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Stillen Exhaust, Stillen Supercharger, Stillen Oil cooler, Stillen Headers, Test pipes, 928 Impeller, 9 lbs pulley running 12lbs of boost, Custom tune from National Speed. 415WHP 345TQ
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