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K&N 85-4600 Adapter

Performance Products > Adapter
  • Manufactured using high quality materials
  • Engineered for performance
  • Fits Hillborn 2-1/4 inch restrictor stacks
  • Made in USA
  • Backed by K&N warranty
These adapters are used with K&N's RD-4600 Universal Air Filter to fit onto Hillborn 2-1/4 In. restrictor stacks. Package includes eight adapters.


Product Specifications

Carburetor Flange Size2.25 in (57 mm)
Outside Diameter2.5 in (64 mm)
Width2.188 in (56 mm)
Product StyleAdapter Flanges
Flange TypeAdapter
Height1 in (25 mm)
Package Contents8 Adapters
Weight0.5 lb (0.2 kg)
Product Box Height5.75 in (146 mm)
Product Box Length5.38 in (137 mm)
Product Box Width5.38 in (137 mm)
Adapter Flg OD2.5 in (64 mm)

K&N 85-4600 Adapter Product Reviews