I ran them on my FXDXT for 6-7K miles. There loud and small. They do not have the best slip-on sound . Good chrome, in fact they still look good setting on my bench. There cheep thats why I bought them, paid 70 bucks (with discount coupond) including free shipping. As for preformance : as good as the worst big name slip-ons if not better and that 's not bad.