Follow-up: Removed the after market oil cooler and went with the OEM unit. Oil pressure was excellent all weekend. Racing in 90+ degree temperatures last weekend the engine temperature never went much over 160. FWIW we are using the Bosch oil filter.

So, don't know about the quality or installation of the after market oil cooler that was on the car, but we certainly don't seem to need it.

Thanks for all the help!

Dave