I was wondering if any of you guys knew the grade of their stainless mandrel and if its polished. I'm building a mani for my 93 accord. I did buy a dsm one off ebay but it was cracked and I did'nt feel like having to reweld it all the time so I'm just going to sell it to this car dealer guy I know who needs one.

 

Im not sure but I dont think its thick enough for a manifold.
now for intercoolers, it's perfect. Picked me up some in a Groupbuy he had once on here. Maybe he has some new material

Link?