Sounds to me like the clutch is worn, especially if it's slipping. I would verify your pedal is adjusted correctly since there are ways to drop the friction point to make sure it is fully engaged when you're off the pedal.
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2014 Nissan 370z Gun Metallic 6-spd
Test Pipes | Nismo CBE | Stillen Gen3 | Swift springs | Advanation Sway Bars | RJM Clutch | GTR DBA Premium Wheels
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