Looking at the new 4in rineharts, currently have 3.5s. Wondering if anyone has done a dyno compare. My guess is you gain HP up top but lose low end torque.

 

I don't have TQ numbers but my understanding from the fuel moto folks, they are similar to the 4.5" Jackpot Pro Touring exhaust in performance. I'd check out the dyno runs they've done with that pipe and you'll have a good idea.

 

I have a 2011 Road King Classic. Did a Stage II build. A Big Sucker, a set of SE 204's and a set of 4in. Reinhart True Duals. Had it dynoed alst week at the dealer, when they put the Cams in. She screams. I'm coming in at:

Max Power = 91.98
Max Torque= 106.46

Hope that this helps.

 

Who cares? They look GOOD!!

 

Both sizes have the same size baffle.