12v rear bolt in freeze plug with NPT port

[fnschlaud4620]

What companies make them? Please Pm me prices and pics.

Also what is best, to feed cool coolant in the plug or to have it as a pressure relief bypass?

Thanks

 

[roachie]

http://www.puredieselpower.com/catalog/9402-cummins-cooling-kitimproves-coolant-flow-cylinder-p-1374.html

 

[White Knight]

A little cheaper and billet always looks good: 89-02 Dodge 5.9L Cummins Diesel Bolt-in Freeze Plug That one's made by Haisley Machine. EEP also makes a kit: Enterprise Engine Performance - BILLET REAR FREEZE PLUG UPGRADE '94-'02 5.9L CUMMINS Billet Racing Components

Everyone uses them as a bypass port as far as I know

 

[mech2161]

I have the one below and can't use it. I'd let it got for $50 shipped.

 

[rileydsking]

cummins makes one too. my 92 industrial 12v has one.