Can I add the D & D interceptor slip-ons with out any additional re-mapping? I am currently running the Hi-Flow K & N 3909 with a Stage 1 canned map from the dealer.

 

I too am running the Police Interceptors, andI have to agree with the others. Engine build has a LOT to do with it. I suppose on a "stock" bike they will be quieter, but on a "built" bike they will be louder. I am running a 96" AMS kit, Andrews 26G cams, and true dual head pipes. The sound is louder than I hoped. So much so, I am considering going back to a cross over just to cut down on the sound.

Now, in my long history of exhaust system experiences, I have found them to be quieter than the FullSac mufflers, Hooker mufflers, and Rineharts.