First time rider and buyer of a motorcycle a few months ago. Just getting into it and I found the pipes I wanted, were the Big Radius 2 in 2 black Vance and Hines! I got them and the guy I was buying them from told me I would need to get a tuner due to the fact it would back fire and I wouldn't get the performance out of it, I'm not a mechanical person but in the process of learning of to take care of my vehicles my self. Any body know about this?