Hello,

I need to know both ID and OD sizes for the straight water hose that runs on the passenger side of the block to the 3 way tee.

Thanks,

Most of us are just using 5/8 ID heater hose. Nothing special. Basic car parts store stuff.

I second that. 5/8" ID. Just recently replaced mine. No magic.

Thanks I am purchasing a oil to water heat exchanger and wanted to double check the size.