Holden 6 Cylinder 149,161, 173, 179, 186 & 202 Welsh Plug Kit Brass

Holden 6 Cylinder Welsh Plug Kit Brass — 149, 161, 173, 179, 186 & 202

Designed by Aeroflow Performance, this brass Welsh plug kit seals the casting core holes in the engine block. The expansion plugs protect against cracks caused by the pressure of frozen coolant, and during regular operation help ensure that all vital fluids stay inside the engine where they belong.

• Brass Welch plugs included for reliable block sealing
• Steel oil gallery plugs included
• Cylinder head plugs not included
• Specifically designed to suit Holden 6 Cylinder engines with displacements 149, 161, 173, 179, 186 & 202
• Complete kit with all correct sizes for a full engine rebuild

• Seals casting core holes in the engine block to prevent leaks and keep fluids contained
• Brass plugs provide durable, corrosion-resistant sealing under pressure
• Helps mitigate coolant-related stress and protects engine integrity during rebuilds
• Tailored to Holden 6 Cylinder models listed, ensuring accurate fit and sizing

Use this kit during engine rebuilds to ensure proper sealing, reliable coolant containment, and consistent oil and fluid retention in Holden 6 Cylinder blocks.