Spectre
Spectre's polished aluminum inline airbox with air filter has a 4 inch inlet and outlet. This cylindrical air box has an outide diameter of 5 inches. It allows you to create a custom air intake that...
Spectre
Spectre's Air Intake Support Bracket Kit is available for any 4 inch outside diameter intake system. Its universal design allows you to support your intake or filter from an existing engine or fender...
Spectre
Spectre's 4 inch by 2 inch Air Filter is a replacement air filter element for 4 inch round air cleaners. Featuring a flame retardant paper filter construction, this product was engineered for...
K&N Engineering
Light weight yet durable, K&N's Generation 2 Carbon Fiber Air Boxes are a must for any racer currently using traditional multi-Siamese stacks. Constructed from ultra-lightweight carbon fiber...
BikeMaster
Made from aircraft-quality aluminum, the filter is removable, cleanable element for years of service and features an O-ring that seals body for no leaks.
