There are other filters like this on the market but they consist of a side filter and a top. The problem with the other design is that the top, side and separate, let a lot of dirt get into the motor. The last thing you want when you in the middle of a competitive race is to get a DNF because of a blown engine due to dirt. With TOP (The One Piece) Racer, you don't have to worry about this happening.
Currently these TOP Racers come in 3 heights: 3", 4", 5" in the most common diameter used by racers, 14" . They are also available in red media/black urethane.
To address the need for extra protection from dust and dirt with washable/reusable oil-impregnated cotton gauze filters, aFe developed a new filtration technology so revolutionary that it received a patent. This new filtration technology is aptly called Pro-GUARD 7. Pro-Guard 7 Air Filter has 5 layers of progressively finer mesh medical grade cotton gauze with micro fibers that attract smaller and smaller particles as air passes through is combined with 2 layers of random-porosity non-woven synthetic polyester fabric.
This 7-layer combination of cotton gauze and non-woven polyester is sandwiched between 2 layers of epoxy coated aluminum wire mesh. Because of compression ignition of diesel engines, tolerance are much tighter than in a gasoline spark ignition engine. These tight tolerances require clean air and lots of it. Diesel engine require 7 times more air than a gasoline engine of equivalent size. The patented Pro-GUARD 7 filter media delivers more cool clean air needed for extended engine life, better fuel conomy and additional power.