you are lucky to get 10-15 seconds of spray out of a 10lb tank
when you spray your intercooler/heat exchanger you run the very high risk of sucking the co2 into your intake which results in less oxygen and less power
a 10lb tank fulll of co2 is very heavy so what tiny bit of hp you gain is offset from all that weight

it is very impractical since the tank is emptied so quickly and you constantly have to fill it up.

it is a waste of money but if you are set on getting it there are other companies that make similar kits for about 50% of the cost.