[leroy17]

I use Samco Sport silicon hose ends blanking caps on a LS1 water pump. They come in all different sizes and colours (black looks good) are a neat finish and quick and easy.

Williams Race Services sells them and have a good stock, call for either Mike or Steve.

They look like this.

Google Image Result for http://racebikebitz.com/image/cache/data/Universal%20Samco%20Pictures/Blanking-Plug-BCP-RED-500x500.jpg