I think he wants to splice pieces

Well i dont think its either, i just want to put the coupler on the end of the tube i currently have and then put the filter on the other end of the coupler, the only thing i dont know is if the filter has enough length of the rubber stuff to hold into the coupler, i mean i guess i can use some sort of clamps but im just not sure.

Find some 3" exhaust pipe to attatcht he filter to, then couple it to what you have.

Ok gonna buy the coupler tomorrow and the 3inch pipe also, but only thing is, what do i clamp the coupler down with? or is it gonna be a tight fit already? Im just worried about the darn thing falling off.

I'm still missing something here.

The filter should already have a flange for mounting. Are you saying your intake pipe is too short?

Get those metal rings that can be tighten with a screw, usually a flat tip. Autozone will have them or any hardwars store should also carry them in different sizes. Usually in or around the pipe section.

Hose clamps. The turbo (high pressure clamps) look cooler, but they cost more.