I had the 2.5" baffles since new. I just installed no cat FM head pipe and air kit, tuned with FP3 V&H map, My 14 King ran good but lost most of the low end power. I did the auto tune and I got a lot of the low end back. Still I have no real low end power increase. Runs strong when the rpm come up. Do I need to drop down in baffle size now that the cat is gone? Thanks
Gary.

 

I recommend using a smaller baffles size. It will bring back that low end power. If you want the maintain the sound, the 2.25" works great. If you want it a bit quieter the 2.00" will works great. Both will bring back the low end. The 2.50" is just too wide open to maintain some back pressure. Most customers like the 2.25" with open headpipes.
Ryan