Got my Zex dry kit yesterday and plan on installing a 55 shot along with some NGK BKR7E plugs on stock internals. Does N2O put excessive strain on the timing belt and water pump? Is the timing belt and waterpump something I should consider changing before I start spraying? It has approx 75K miles on it. If it matters this is on a B18C1.

For those who are spraying, how many miles do you have on your timing belt and how much are you spraying?