I would recommend new ignition coil packs unless the ones you have a pretty new. The ignition coil packs are prone to failure on those engines after a few years, and pushing them harder with a tune will show up any weak ones pretty quickly, resulting in misfires under load.
Other than that, try the low torque file and see how your clutch handles it. The stock clutch can be overpowered by the increase in torque.
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