Picked up a used/BNIB Vararam and installed it last Friday. This one has the smooth finish lid so I could do some custom painting later on. Didn't install the radiator cover, not sure if I'm going to or not. Also left off the engine cover. There's a wire harness that runs behind the radiator support and looks to block a little air flow (probably negligible) so I removed the clips and tucked it underneath the radiator support and secured with a few zip ties.
I don't have the best calibrated butt dyno, but I can tell a bit of difference, especially when punching it on the highway. It's got a mean growl too!