First time you use it, you would prob find that there are air leaks everywhere .....especially plenium joints/inlet manifold......most of the leaks are "minor" but they all add up.......brush soapy water all over the joins and it bubbles up.....It will even show up a leaking/damaged intercooler easily, some times a leak is so bad you can feel with your hand exactly where the air is escaping from

When you fix ALL the leaks it is like your engine has gained 20-30 BHP