[FredG]

Glad you mentioned that because the hose thing was a concern. I am going to look the sandwich adapter just for the sake of simplicity and now I know someone who has used it. I reached out to Roush and they told me every engine that is dyno tested is done at 200 degrees but that is without the cooler. They were surprised to hear the oil temp was that cool. I told them there is a lot of discussion about it.

Fred

Originally Posted by spdbrake

I went with an Earl's sandwich adapter attached to the remote filter head.
https://www.holley.com/products/plum...t/parts/502ERL Starts to open @ 160f, full open by 180f.

Improved Racing does make nice looking equipment.
Personally I like the Integral Thermostat Filter head or Sandwich adapter over any In-line thermostat simply because you only have 4 hoses VS the 5 hoses with an in-line installation. Just a bit cleaner look without a loop-back line.
If my Earl's sandwich themo dies I'll most likely buy a Improved Racing remote head thermo in 185f.
Remote Engine & Transmission Oil Filter Mount with Thermostat ENV-170

Routing description on different types of installs:
https://documents.holley.com/199r10647rev1.pdf