that will be the exact way that i do it thanks alot guys, but did he just thread the brake line into the stacks or tid he put some sort of nozzle or tip on it to kepp the flames from entering the break lines

Because of the scavenging affect of the pressurized gas flowing through the orifice you wont get the flame back up through the line.

so all i will need to do is tap a brake line into it and it will be fine

Just use a standard propane line. Much cheaper and will do the same thing.

ok i will look into that thanks alot

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ok one last question will the exhaust temp in the stacks be hot enoph to ignite the propane

you will need an ignightor