There actually alittle on the rich side stock. Just drilling the exhaust you be good. Theres already a post on it but spend the extra money and get the cobra powerpro autotuner It will automatically tune to what ever you change on the bike and it gives the bike alot more power. With a power commander you'll have to take the bike and get it dyno'd to get the most power out of it. but if you change anything later you'll have to get it done again. I have the autotuner with drilled pipes and opened up the hole for the air box and she screams now. Strongly recommended.