need piping
But Burns Stainless has everything.
another option http://www.globaltecheng.com/Product...?idCategory=65
https://ls1tech.com/forums/showthrea...mandrel+tubing
but i dont think any sponser here directly offers 4"
also might try www.airflo.com a semi truck supply co. not sure if they have stainless or aluminum bends but ive used them for aluminized steel
Jim



