what piping should i be using for mt turbo intercooler and downpipe

[SQ is the SQUAD]

i plan on running everything 2.5 inches. fully custom catback with resinator. my main question is what is my cheapest/best option to use for my intercooler piping. i was about to buy one of those kits off ebay but wanted to wait to find something cheeper

[Accordtheory]

Are you boosting the stock engine or a b series? Did you do finish the swap? I just used mild steel 2/1/2 exhaust tubing for my intake, since I was too cheap to buy stainless and don't have a tig to weld aluminum..but at least I clearcoated it and it looked ok..

[SQ is the SQUAD]

nah, this is for the a20 in my coupe, the b20 is on hold for now to more funds come through