I spent so many time trying to troubleshoot the surging from my older aFe Pro 5 R that I will steer clear of that product.
For almost the same price, you can go for the performance intake. Maybe not as loud as aFe can be; but is a much more refined sound. Cant wait to hear about the magnum intake.
And for those who are concerned about the secondary air inlets; the performance intake also got some. In fact, except from the filter size it uses (PI is a flat panel and aFe is a 6" spherical), I would say its almost a replica.