Harley-Davidson Exhaust HP/Torque
Question, I have a 2008 with a TC 96. I recently put on a Big sucker air cleaner and an fp3. Am looking at changing the exhaust this winter. Am inclined to go with Rinehart True Duals. However, I’m repeatedly advised to buy Thunderheader. Can anyone tell me how much hp/torque each would add or the difference between the two? I’m really looking for numbers, not seat-of-the-pants feel.