I have an 04 r6 and I just put on a two brouthers slip on pipe on it. Now it sounds like it is missing when I am riding at about 25-35 mph or when I let off the throttle. The dealer said I need aa power commander. What do you all think? I really don't want to spend $200 on one. Thanks.

Check with Two Bros. technical support. They may have suggestions wether you can get away with pipe and no fuelly ajustment. They'll know better than you dealer. Dealer sells a couple pipes, Two bros. sells thousands of pipes.

All you need is the "Wire #29" mod. I posted a how to in the mods section (sticky). Trust me, this WILL get rid of your problem...for free.