they are aluminum. While there are aluminum kits for mig welders, it is an uncommon practice to use a MIG welder for aluminum. Aluminum is almost always welded with a TIG welder.
My understanding is that Aluminum does not play nice with steel…
Looks like they do not have 2.5" anyway…
But I may want to scrap my old turbo header for the flanges and make a new 4-1 header. That might let me use some.
i watched them use these on hot rod TV over the weekend, and they migged the header tubes just fine… from what i saw in the show, they were mild steel…
My header would not be 2.5", but the remainder would be.
I have never tried to weld anything and figured it might make the task a little easier. I’m not looking forward to running the pipe up and over my rear twist beam.
If You paint Aluminized or Mild Steel exhaust pipe, will it last a year or two longer?