[blykins]

You just have to remember that there's more to clutch capacity than the pressure plate.

Most of your SBF pressure plates from the major manufacturers are made from Valeo and are around 2200-2400 lbs clamping force. RAM/McLeod/Ford Racing (King Cobra) use the same pressure plate and they vary the clutch disc material to allow for more horsepower capacity.

Now, as mentioned above, Luk has a good reputation, but the holding capacity will greatly depend on the clutch disc material. A regular sprung hub disc with organic friction material on both sides will only hold so much.

Typically, there are 3 ways you can increase horsepower capacity: 1. Add more clamping force 2. Use another disc material 3. Add additional clutch discs.