Yeah I've been looking at different filter shapes and looking for something conical yet smaller that will give comparable filtering area yet a maximum amount of space AWAY from the splash shield...
EDIT: Here are some ideas...these pictures are K&N but they are just for example...I plan to find comparable Paper filters as well for those that prefer them...however, due to their immense amount of custom shaped filters, they are a good place to start for the measurements and shapes we need...
RU-2430 Product Specifications
Product Style: Round Straight Universal Air Filter
Flange Inside Diameter: 3 in (76 mm)
Flange Length: 0.625 in (16 mm)
Flange Type: Centered
Height: 5 in (127 mm)
Outside Diameter: 5 in (127 mm)
Top Style: Rubber
RB-0900 Product Specifications
Product Style: Round Straight Universal Air Filter
Flange Angle: 5 degrees
Flange Inside Diameter: 3 in (76 mm)
Flange Length: 1 in (25 mm)
Flange Type: Angled
Height: 4 in (102 mm)
Outside Diameter: 4.5 in (114 mm)
Top Style: Rubber
RC-9130 Product Specifications
Product Style: Round Straight Universal Air Filter
Flange Inside Diameter: 3.188 in (81 mm)
Flange Length: 1 in (25 mm)
Flange Type: Centered
Height: 4.438 in (113 mm)
Outside Diameter: 4.938 in (125 mm)
Top Style: Metal
RX-4750 Product Specifications
Product Style: Oval Tapered Universal Air Filter
Base Outside Length: 8 in (203 mm)
Base Outside Width: 6 in (152 mm)
Flange Inside Diameter: 3 in (76 mm)
Flange Length: 1.875 in (48 mm)
Flange Type: Centered
Height: 6.5 in (165 mm)
Top Outside Length: 5 in (127 mm)
Top Outside Width: 5 in (127 mm)
Top Style: X-Stream
RX-4990 Product Specifications
Product Style: Round Tapered Universal Air Filter
Base Outside Diameter: 6 in (152 mm)
Flange Inside Diameter: 3 in (76 mm)
Flange Length: 1.875 in (48 mm)
Flange Type: Centered
Height: 5.563 in (141 mm)
Top Outside Diameter: 5 in (127 mm)
Top Style: X-Stream