I've had some issues with the breather bolts backing out of my heads on the Heavy Breather, so I gave up on it for now. I looked around for a while for the right filter, and I ordered the Overflow. I swear my bike runs better now even when it did with the HB, even though it was dynoed with the HB. The throttle response is way better, and there used to be a bit of a bog at 2500-2800 that is gone (only slight, but noticeable). Anyone else use one of these? Supposed to flow 800 CFM vs. 450-ish for a SE Stage I.

 

Seriously? Nobody else has used this? I would think it would be ideal with the 58mm throttle body and back plate...

An option for those who want the same or more airflow than from a Heavy Breather.

 

Does it have the 4 bolt hole pattern that the 58 backing plate requires? I have the HB on my 58 and have the Highflow plate as well but I don't really care for the paper element so I'm running the HB and have the other in a box.

 

I have one but took it off for the heavy breather. It's only drawback is it sticks out quite aways and hit's my leg, nice piece though.

 

They make different adapters for each type of air filter back plate. The filter is universal. It will really make a difference over the paper element. I was shocked at how much better my bike runs than with either the Stage I K&N or the Heavy Breather.