Looks good man. Ive run an M4 GP, two bros, Akrapovic carbon fiber shorty, taylormade and yoshi r55 (current) on my k7 600. I can verify everything everyone has said about two bros. They look nice, but the quality and sound is nothing near the more expensive pipes. The m4, r55, akra and taylormade are all great options that sound and fit amazingly. If and when youre ready to upgrade check ebay for used pipes. That is where I usually buy. You can find great deals on used pipes with little to no damage if you take your time and wait for a good deal to pop up