xxx4...... is it worth investing?

[Chrissy Boy]

As the thread says really, I am thinking of getting back into the hobby after a long break and am just curious as to whether there is any life in them still, would it be competitive at club level, are they hard work to run, are there still spares available, all the usual questions from a novice really, thanks in advance, Chris. PS- my local club is an all grass track if that makes any difference to the advice.