BINGO - I just went through this when I got my V&H HOs to replace my CVOs with Fullsacs - I listened to everything and the "volume" is all about the same - The tone is what makes the difference.........and the difference is by no means monumental......but its thereYou will only get so much sound out of any slip-on with the M8 motor and the cat head pipe. I have heard many different slip-ons on stock M8's, Rhineheart, Vance and Hines, and RC components. They all have about the same volume.
Dave, going to go with the 2.0 cores and Techmat in my stock CVO slipons along with their MX pipe. Will I need a retune after doing both of these, looking at the HD SE Pro Street tuner as I am not trying to squeeze every HP and TQ out the already awesome 117 and another rider on FB said it can be set up by your dealership as I am also not map friendly. ThanksAs some one who put 20,526 trouble free miles on my 17 CVO Street glide with Slip-ons and no tune, your dealer is full of it. Yes the P&A catalog says you have to tune also. However with the cat, there is so little change there is no need to tune. The New HD tuner can not change the fuel map anyways which is why you would tune.
My wife's 17 Road Glide has had zero issues, and the dealer installed the Street Cannons with out doing a tuner or map.
My 18 CVO Road glide has Fullsac baffles in the factory mufflers, no tune required. 4468 miles so far.
If I were to also change the air cleaner, or remove the cat then a tune would be needed.
If you remove the cat, the HD tuner can not adjust the fuel mixture to compensate for it.