Originally Posted by VinceCarter
Really? What's the torque capacity on an OEM WRX clutch? Because the torque numbers he is putting up already look like he's entering aftermarket territory.
From what I have been told, the stock WRX clutch will hold VF39 torque. The question is for how long. Obviously the clutch will start slipping sooner at 330 WTQ than at 280 WTQ (typical level for Stage 2).
OP, you can keep the stock clutch until it starts to slip. No sense in replacing a clutch that is holding. The question arises when you need to replace it. At that point opinions differ. A new stock clutch will hold the torque and be easiest to drive. You just won't get 90k miles out of it like you could at stock torque levels, and clutch jobs are expensive.
An aftermarket "Stage 1" clutch (like those from ACT or Exedy) will hold the torque and theoretically last longer. But the pedal will be heavier, and they can chatter. I personally went with an Exedy Stage 1 street clutch and a stock flywheel. It engages smoothly and is easy to drive. But the pedal is heavier and I hear a grinding noise at about 2200-2400 RPM under heavy acceleration. Under normal acceleration it is quiet.
Long story short, stick with the stock clutch for now and do research when it comes time to replace it. If you do go upgraded, don't go heavier than "Stage 1". My $.02, not the Bible.