[JAM1775]

I had FFR 2.5 "ID , 20" long blown glasspacks. I would use earplugs mostly on highway trips. I was not looking to deaden sound until they were fully blown and would hurt my ears at peak rpms . When I cut them off there was actually no more glass pack in half the mufflers making it even more than 2.5" ID as exhaust could slip around and above the mesh. I then opted to install 18" long , 3" ID Dynomax Race Bullets and added merge collectors . Immediately the motor lifted up with seat of the pants added power anywhere above 4500rpms. But......the sound was ear piercing loud at idle . It was downright intolerable for me at top end. The more rpm the louder they became. The sound never seemed to level out even at cruise. Anywhere above 3000rpm was inner ear piercing. I wore ear plugs and rolled through a town where folks were looking over their shoulder while holding their ears.
One week later I took a sawzall to the Bullets and left them in a dumpster. I installed Lobak "Race" Mufflers which have the larger 1.5" center tube (standard = 7/8") with 6 augers filling the remainder of the 4"ID muffler tube. They are loud but not as loud as the blown glasspacks. I'd compare them more to new GP's. They bump at idle real nice. They do have a sweet spot in the 2100-2400 range which puts me at ease, with no earplugs, at highway speeds. They get loud at 5500-6000+ rpm but so too did my new original GP's. With the blown GP's the motor pulled 417rwhp on a 70 degree day . Similar temps it pulled 420 with the Lobaks /merge collectors. Only recently did I feel I'd want earplugs but we're now in the low 50's which is a factor for me especially on the highway. That's just my experiences as we all have different tastes and tolerances. The Race Lobaks are not quiet mufflers. Don't know if they do well with BB's. But...they worked for me.