This system has not been dyno tested yet,My priorities were more towards functionability and fit,As many variables as there are in dyno testing(ambiant air temp,humidity,elevation,mods,dynos ect,ect.)As we know our cars are as sensitive as our wives,what works well one day changes with the weather or the attention we give it.I do know this, this system is a perfect fit,design and also does what no other system has done and that is introduced air from the NACA duct and more importantly through the facia,and for those that do like to open there hoods it has a very,very apealing look.It does not take rocket science or dyno testing to see that comparitively speaking this is a great improvement from most or all systems.If you figure the time in developing and cost in making, $900 is a gift.Also this is one of the few if not only systems designed as a direct fit for the ROE Charger with no mods or oversize hoses to make a fit,And is also avail for naturally aspirated Gen1s and GEn2s.If you want dyno #s for your particular car and mod variables.Remove you hood,and you filters and put a 70" fan in front of your car.you should be pretty close.Lets face it what could be 20 hp on my car could be 0 to 30 on others.No flame intended on this,I am just being realistic.