I had 180's put in my BXS yesterday, a CAT part. One was stuck open and engine was heating too quickly. Did this at PDI in St George UT. Left there and it was 105 with a 25 mph headwind so I didn't see much difference in the way it heated up but the temp dropped back quicker when not under load. I was very tempted to buy the manifold since I have a broken stud on mine, but didn't. BTW, the PDI people were very attentive, nice and professional.