I installed the Ultra Cool oil cooler on my 2019 Harley Tri Glide Ultra with a stage two 114 M8 engine. My test ride after installation was in 106 degree heat from Lake Havasu City to Kingman Arizona. It handled this heat fantastic. While on the freeway at 70mph the Heat Exchanger fans never came on. The cylinder temperature I captured was 210. After exciting onto surface streets the fans activated and once stopped, cylinder temperatures were 248. The return trip the air temperature was 112 degrees and cylinder temperatures were 245 with the cool fans not activated until exiting the freeway. The fans then came on and cylinder temperature at shut down was 238 with the Heat Exchanger at 188. This is the best purchase I have made for my Trike.