PALOZO 1.75" Exhaust Collector Flange and Donut Gasket Kit, 2 Bolt 1.75 inch/44.5mm Collector Manifold Flange Donut Manifold Gasket with Exhaust Manifold Bolts and Nuts Kit with Springs(2 Pcs Flange) Specifications Item: 1.75'' Exhaust Collector Flange and Donut Gasket Kit Size: 1.75" Collector Flange Exhaust Header Kits Work Together to Weld onto Catalytic Converters, Exhaust Test Pipe or Exhaust Systems Package include 2 x 1.75 Inch Exhaust Collector Flange 1 x 1.75 Inch Exhaust Donut Gasket 2 x Bolts 2 x Springs 2 x Nuts 2 x Washers Amazon Services If you have any questions or problems with the product, please contact us and we will try our best to help you as soon as possible.