GM LS1 LS2 LS3 Welsh Plug Kit Steel Material with Plastic Barbell

Designed for GM LS1, LS2 and LS3 GEN3 engines, this Welsh Plug Kit from Aeroflow Performance uses sturdy steel construction to seal the engine block’s casting core holes. The expansion plugs guard against cracks caused by the pressure of frozen coolant and, in regular operation, help keep essential fluids safely inside the engine where they belong.

• Includes brass Welch plugs
• Includes steel oil gallery plugs
• Does not include cylinder head plugs
• Specifically designed for GM LS1/LS2/LS3 GEN3 engines with all correct sizes included for engine rebuilds
• Completes the engine block freeze plug set for sealing core holes during rebuilds to prevent leaks and maintain proper coolant and oil routing

When you're rebuilding your engine, choose a kit built to fit your make and model, with the correct sizes included to ensure a precise, reliable seal.