Originally Posted by locked

Protoform mazdaspeed6 lightweight is the most common go-to shell for carpet. Other shells can work well too, in certain conditions, depending on driving style and setup, but speed6 lw is what most people use, the majority of the time.

Just answering because it's pretty late in England, so Skiddins might not see your question until tomorrow and I kind of doubt he'll have a vastly different response than this anyway.