Velocity Stack Filters BBR Velocity Stack Cover Filters are the perfect addition to your open stack.These filters are made with a fine stainless steel mesh and silicon end cap for a snug fit that is easy to apply.Our Stack Covers prevent any outside contaminate from entering your engine while maintaining horsepower due to our patented design. Velocity Stack Filter 57mm/2.25 Stack CoverRated 0 out of 5 $59.95 Add to cart Velocity Stack Filter 64mm/2.50 Stack CoverRated 0 out of 5 Read more Velocity Stack Filter 70mm/2.75 Stack CoverRated 0 out of 5 Read more