HGK Racing - Carbon Sprint Car Air Filter Base Plate For Carburetor Type Intake [Carbon Fiber]Sprint car air filter base plate for carburetor type intake. Light weight and durable, K&N's Sprint Car Style Air Boxes are a must for any racer currently using traditional multi Siamese stacks. Constructed from ultra light weight carbon fiber K&N's Sprint Car Style air box provides ample air flow for your racing needs. As with all K&N filters, it is a washable and reusable air filter. Mounting bracket kit includes mounting brackets as well as