This K&N racing air filter is made with 2 layers of cotton and does not come oiled. It was designed to provide even lower air restriction than our replacement air filters for street vehicles. K&N racing air filters are washable and reusable and come with a one year limited warranty.

This K&N Racing Air Filter is made with 2 layers of cotton
It was designed to provide even lower air restriction than our replacement air filters for street vehicles
K&N racing air filters are washable and reusable

Warranty Information

K&N Warranty Info (PDF)

CA Prop 65

CARB warning

K&N E-3728R Specifications

KEY SPECS
MFG. Part #	E-3728R
Brand	K&N

GENERAL
Material Type	Cotton Gauze
Overall Height	3.5"
Inside Diameter	12.5"
Notes	Designed for Asphalt Racing Only.
Outside Diameter	14"
Shape	Round
GTIN Code	024844038104
Inner Wire	No

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