You must be logged in and verified to contact the designer.
This set of four air cleaners (two per truck) is the rounded top type with an elbow. Note that the air vent 'cover' is slightly off center at 6 degrees, so it faces the front of the truck at a 90 degree angle. The pin included on the mount is optional for help in mounting it securely to the truck. Should there be a question or comment, conctact me via the designer link or via email to firstname.lastname@example.org