I have the cobra long shots on my roadliner an they sound incredible the performance jumped rt up ..they did away with the catalitic converter so u´ll have 2 get a sumthimg 2 reprogram ur fuel map . When I did mine in 06 there weren´t many options but now there´s a mutitude 2 choose from according 2 ur pocket book an riding style good luck don´t wait u won´t regret it believe me