I have a polished stainless-steel hotpipe for an s13. This is brand new, never used. I just bought a hotpipe with an HKS bov already on it so I have an extra one. It doesnt have a flange on it so you can weld any kind you want. The diameter is 2.25". $80 shipped. My email is shamo775@bellsouth.net. I'm located in South Florida.