They're mainly for esthetics, I have then on mine and really like the look. I have a good amount of motor work and can say they dont do much for preformance but it does let you hear the intake suction a bit more. Personaly I recomend them but I did buy the cover for the throttle body/linkage behind the right side cheese wedge. That would be the only down side is with out the cover (I think from vic baggers) it showed the throttle body and linkage. Also on the upside it seems like I can get a bit more fuel in the tank cause of how it raises it, but that could be me imaging that.
2015 Cross Country 8-ball
Custom tuned with Maximus tuner
Hot Vic Powercone debaffled slip on's
Mafia Customs 18's with heated grips
LRS 10" clear flip shield
Victory LED head light
Clear Water Darla LED lights
Alpine head unit
Magnum speaker boxes with Alpine 5 1/4s
Crash bars with Victory hard lower inserts
Changes are still being made so more to come....