Small Block Chevy 305 307 327 350 400 Welsh Plug Kit Brass Material

Small Block Chevy Welsh Plug Kit - Brass and Steel for V8 305/307/327/350/400 This Aeroflow Performance Welsh Plug Kit is engineered to seal the casting core holes in your Small Block Chevy V8 block, helping to protect against cracks caused by the pressure of frozen coolant and to keep vital fluids safely contained during both everyday running and engine rebuilds. The kit blends brass welsh plugs with steel oil gallery plugs to provide reliable sealing where it’s needed most. Cylinder head plugs are not included. What’s included - 10 x 5/8" (16mm) outside diameter brass welsh plugs - 1 x 7/64" (2.7mm) outside diameter brass welsh plug - 3 x 1/2" (12mm) outside diameter brass welsh plugs - 5 x 1/4" NPT steel plugs (oil gallery plugs) Compatibility and purpose - Specifically designed to fit Small Block Chevy V8 blocks across models 305, 307, 327, 350, and 400, making it ideal for complete engine rebuilds or block refreshes. - Complete kit includes all correct sizes for rebuilding, ensuring you have the proper plugs on hand for a clean reassembly. - Seals core holes effectively to prevent leaks and reduce risk of coolant or oil migration during service life. Material and build notes - Welch plugs are brass for dependable sealing in the core hole areas. - Steel plugs are included for the oil gallery applications where steel is preferred. - This kit focuses on core hole and oil gallery sealing; cylinder head plugs are not part of the package.