[blykins]

Patrick, I'll check into it.

You don't necessarily have to go with a heavier 11.5"-12" clutch to get good performance.

McLeod has a nice 11" setup with a diaphragm pressure plate that's rated for 550hp and RAM has a nice 11" setup, also with a diaphragm plate that is rated for 600. The RAM uses a little rougher clutch disc though, so you may experience a little chatter on take-off.

The 12" pieces are made to fit onto a 11.5" pattern, but you get a little more clamping force.

Unless you're drag racing on wrinkle walls, I see no need to go with such a large clutch setup. Cobras are so light and they usually break traction before they really load the drivetrain.