I have tried ramair foam filters which i must say are also good quality foam filters but i found this UNI 2 stage filter of better quality and it provided better performance on my bike than the ramair filter. I also like that the 2nd stage is removable and this helps to further lean out the AFR ratio without haveing to change the jets in your carburetor. But i would recommend upjetting your carburetor (if your bike has 1) if you use this filter and the removable 2nd stage allows for further fine tuning of the AFR ratio if needed. A very good product so 5 stars.
These filters are really great for dirt bikes, when you want a quick fix for air box delete or no air box available. Two stage filter, easy fit, and they come with a correct size hose clamp. Oil it up and go. Stay out of deep water!
excellent filter i have used this brand many times of the years and am totally satisfied with the performance. fit over a 28mm keihin carb bellmouth with no problem