I would go with the SE Super Tuner not a dealer download, just a "Stage 1 A/C" uses stock cover and a 2-1 exhaust, pick your flavor D&D, RB Racing, Rhinehart etc, all are good and will give you the better hp & tq over Tru-duals. Have fun making your desicion!

 

got the fuelmotot package and couldnt be happier im not a pro wrench and it took under an hour.

 

The Fuel Moto Power Package (PCV, DT Jackpot mufflers, AC) is <$700. IMO it is the best Stage 1 bargain on the market, and perhaps the best option regardless of price. It has the sound, but is not loud, and the best (or very near) HP/TQ numbers you can get from a stock engine. This is due in part to the asymmetrical baffle design and FM's accurate PCV maps. On top of that their customer service is top-drawer. Do a search here on "Fuel Moto" or "Jackpot" for lots of owner feedback.

Fuel Moto

 

If HP and Torque are your primary concern then you want to do a 2 into 1 exhaust. If you go with a 2 into 1 the best by far for performance is the D&D Fat Cat. Awesome power but they sound like a muscle car. As far as breather, probably the Zippers upgrade kit to the Harley Davidson Screamin Eagle Stage 1 or a SE Heavy Breather. Now this is want you want if you are strictly talking about HP and Tourque. The worst thing you can do as far as performance is use true duals but they will sound better than a 2 into 1, at least to me. Some like the sound of 2 into 1's. The next best thing for HP and torque is to run your stock head pipes and just put good mufflers on, like Rhineharts or D&D slip ons. These are the best slip ons that I have found so far, others may differ. It all depends on your primary goal or which ways you want to compromise. Usually you will sacrifice sound versus performance or vice versa. I love my setup with Big Radius pipes and Thunder Monster baffles. Awesome sound and good power. Hope this helps.