If it were me I would go with the appropriate Doherty Power Pacc for the intake:
http://www.dohertymachine.com/index.php?cPath=2_27For exhaust I would consider a Fatcat 2 into 1 with quiet baffle or the new concentric baffle:
http://www.danddexhaust.com/catalog/2009/09/556-31.htm This pipe will give you low-end torque that comes in early (torque curve shifted left) which is good for our heavy CVO Ultras in the rpm range in which we most often operate.
D&D also offers the Fatcat 2 into 1 (black or chrome) with a Zippers High Flow Air Cleaner (as a package) and claim that no download (tune) is necessary.
If I were going to add a tuning device I would go with the Mastertune TTS which is basically an advanced design of the original SERT. The engineer who developed the SERT for Harley has moved on and now offers the Mastertune TTS:
http://www.mastertune.net/HD_master_tune.htmlThese suggestions are just my humble opinion having a FLHTCUSE with a 107CI conversion including Rinehart True Duals and a SERT.
As you can see by my attached Dyno Chart my numbers are good, but my torque comes in about 800 to 1000 rpms later than it would with a Fatcat 2 into 1 with a quiet baffle.
With the Fatcat 2 into 1 with quiet baffle I would expect approximately 100 ft/lbs of torque by 2200-2300 rpms rather than about 3250 as seen on Dyno chart.Where you want your torque to come on is really a personal choice based on riding style. However, with a heavy bike, especially riding 2up, early torque is considered desirable by most and the "seat of your pants" dyno will really be enhanced.
My build is as follows:
NRHS Stage 2 CNC welded & ported TC 88 heads (1.90 intake and 1.615 exhaust) set to 87cc to achieve 10.2:1 compression (swapped out my 103 heads)
Andrews Hydraulic Cam Conversion Kit with Andrews 54N cams
Bored Cylinders to 3.938 and installed CP 107FT forged pistons
Changed out injectors to SE 4.90 gms/sec
SE High Flow Air Cleaner and Rinehart True Duals with Performance Baffles
Dyno Tuned - SERT
104 Max Pwr 112 Max TrqTom