This is the long awaited and improved Mike Kuhl River Rat water pump ,
it fits the same ,as the original Mike Kuhl river rat pump that have been around since the 1970s,
but is now billet 6061 aluminum CNC machined with tighter tolerances
and a 4041 hardened shaft
the housings are hard anodized and then sent out for full polishing before final assembly
They feature a 3/8 drive hex which is the industry standard .
The water inlets are 1/2 pipe with an o-ring seal with a -10 AN fitting on the inlet side (larger fittings will fit )
and a -8 AN outlet for compatibility with most systems .
this can be used with front cover in place in carb applications and with the cover off you can bolt your fuel pump right on ~
Use it on Gassers to drive your fuel pump off a timing Cover