TSR 4 Aluminum Air Funnels

[calamarichris_imp]

I had a nice conversation with an old man on an old Kawi GPZ1100 out in the desert a few years ago. He was an old racer with some interesting stories, a terrible limp, and he really knew his stuff. One thing he said has stuck with me ever since: "We spent a lot of years and a lot of money trying to get around that track faster than each other, and one of the things I learned is that Mr. Kawasaki knows a lot more about making a motorbike run well & go fast than Misters K & N do." (Referring to K&N air filters.)

Airboxes are beneficial, magical things and it's generally not a good idea to fiddle with them. They do a much better job of keeping the engine heat out of the intake than pods or plain filters do (cool intake = more efficiency & power.) And the factory engineers generally know more about pressure-waves, turbulence, harmonics, and air-flow than your average aftermarket mountebank.

Also my bone-stock little Harley 883 pretty much ruled the roost in Pueblo, CO against all the big (1300+cc) twins and FXRs with straight pipes, aftermarket carbs, ported/polished intake tracts, and some guys even running straight air-horns without any filtration at all.
Aside from suspension, stock is almost always best IMO.