The Air Hammer comes in both 2" and 3" assemblies. The 2" (center mount) will look and provide the same fit and leg clearance as the stock or SE filter can. The 2" (offset mount) shifts the filter assemble forward for better leg clearance. The 2" assemblies are plenty big enough (sq. inches of filter media) to support 100+ hp.
Unlike the cheaply made, plastic, SE filter assembly, the entire Air Hammer is made from billet Aluminum.
The Air Hammer is identical to the NRHS Hurricane Flow, they were designed by the same person.

 

I just ordered the AIR HAMMER setup, thanks for the info cHarley

 

The BEST BANG FOR THE BUCK would have probably been the Vance & Hines Naked V02 from someone on eBay. But if you want a hot A$$ look you need to spend a lot more.