x2To be honest i would just go all out and buy a full system! I bought a slip-on and then found a great deal on a full system and the difference in performance was huge. So if you just talking just slip-on's then there won't be too much of a difference in performance.
I'm sorry but I disagree with you. Sport Rider did a test on about 30 different slipons 3 or 4 years ago and the 2Bros. was the only one to finish in the top 3 in hp gains,fit and finish,ease of installation,noise level and price. With a 2Bros. slipon and dyno tuning I gained 6 peak hp and 3 hp in my midrange as well as about 2.5 ft./lbs. of torque.Not trying to change your mind, but are you set on getting a two brothers! There are many other excellent brands out there that give much better performance!