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85-6851 K&N Top & Base Plate

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Top & Base Plate
The K&N 14 inch air filter top and base plates fit any round 14 inch K&N high-flow air filter for boosting the performance in carbureted race cars, hot rods, muscle cars and pickup trucks. The plates are made from lightweight aluminum with a spun aluminum finish featuring K&N logos embossed on the outer edge of the top plate. The base plate fits carburetors with a 5-1/8 inch air horn flange and drops the filter 1-1/2 inches below the carb flange. The drop base design helps to maximize air filter height while still clearing the hood in many custom applications. These K&N 14" top and base plates will work with various heights of K&N high-flow air filters such as the 2-5/16 inch tall air filter E-3740, 3 inch tall air filter E-1650, 4 inch tall air filter E-3750, 5 inch tall air filter E-3760, 6 inch tall air filter E-3770 and several other variations meant for drag racing or off-road racing use.
  • Made from lightweight spun aluminum
  • Fits carburetors with 5-1/8 inch flange
  • Drops base of filter 1-1/2 inches below carb flange
  • 14 inch outside diameter fits K&N air filters: E-3740, E-1650, E-3750, E-3760, E-3770 and other variants
Product StyleAccessories
Height1.5 in (38 mm)
Top StyleMetal
Outside Diameter14 in (356 mm)
Package Contents1 Top Plate, 1 Base Plate
Package Quantity1
Weight2.2 lb (1 kg)
Product Box Height4.63 in (117 mm)
Product Box Length16.5 in (419 mm)
Product Box Width16.31 in (414 mm)
Neck Flange5.125 in (130 mm)
Style1-1/2" Drop Base
Warranty1 Year Limited
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K&N is the home of the original red oiled air filter. In the early 1960s, two motorcycle racers, Ken Johnson and Norm McDonald (K&N), developed a ground-breaking new idea for an oiled air filter. Five decades later, K&N® is still innovating industry-leading filtration technology, and offers outstanding protection for everything from top-fuel dragsters to commuter vehicles across the globe. Thank you for helping us reach 50 years in business!

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