IMHO, Exhaust mods are useless ( as to power ) w/o getting more air, Zippers has a better air filter upgrade, on the TC-88 and my 95" the tune with screamin eagle slipons and low restriction filter includes raising the redline from 5500 to 6250, and that;s saying something, the stroked 96 might be different, but appears the 88 is intake & exhaust limited.
Personally I'd skip the PC, (and for sure the big sucker,) if you're not going to keep on tweakin' it. just do a tune
2008 Flstc Stage 1 Upgrade