about to get a p5 for my buggy and wanted opinions on a few things.

1)for pipe would the 2096 or the 9901 be the better pipe with the 41021 header for a more smooth power band, im still a newer driver so I don't need the ridiculous top end just yet.

2) for break in what venturi should i use- the one I plan on running or is there a better recommendation (ie. no venturi or smallest venturi), I plan on using the heat cycle method.

3)and what is a good venturi to start with