New life for an old shocker set with a few ??'s

Looking to spend a few bucks and liven up my old shocker set (was called the HB4H set when I bought it) to make it sound better.

The set I have is the old 1.5 gallon 120psi kit.

My question is what will happen if I install this? Also does this only upgrade the line from the tank to valve to 1/2 inch? Does the 1/2 inch line run from the push to connect splitter to the horns as well or do those 4 lines still remain 5/16 line?

Will my horns sound better or worse? The tank will also probably drain quicker as well correct?

I do plan on either a K3 or K5la kit here sometime within the next year or so and I’ll probably leave the old shockers on and run them off the larger tank.

Thanks in advance for the help and info.

Answers in red.

On second thought, I don’t think that kit will work for me. I think the port on my 1.5 gallon tank is 1/4 inch. I’ll have to check all this stuff out before I order anything. Getting the time to check it is the hard part.