I've spent the better part of two hours sifting through posts trying to find one solid fix to cool down the TS111 engine. Some say gutting the cat will make it run cooler. Obviously the exhaust will be cooler. Others say installing the PV3 with the right tune will make it cooler. Can anyone say with certainty that there is one thing that will make the bike run cooler......other than leaving it in the garage and taking the car. I don't need it to be faster. It already has Indian stage 2 cams, Indian Air kit, and the upgraded slip on mufflers. I am considering getting the American Custom fix for the cat. But I don't want to waste money. I also like the low end torque and don't want to loose it with the open exhaust.