1) 1.55~1.8mm thickness for each pipe 2) 10~12mm thickness for engine flange and pipe flange 3) Bolts Nuts and Gaskets are inc Exhaust manifold, intake manifold,turbo manifoldMade of Stainless Steel Tig & Mig weld MOQ: 10pcsTIG WELDEach set is tested and dynoed to make sure the fitment and performance meet our goal. - Made of Stainless Steel with mirror polished finish.- Mandrel bent tubing.- ...