It's mod.6, like the original.
I ordered a complete slipper clutch assembly, including spur gear, pads and plates and it was £8.99. As opposed to 19.99 for the LRP one, and they're both the same.
Here's a full listing for the FTX Carnage truggy, with pictures so you cna get a better look at what'll fit.
http://www.freeprawnracing.co.uk/ele...hopups/carnage