The K&N 66-3330R is a base-mount drag racing scoop filter assembly for Dominator-style induction. For 7 5/16 inch Dominator-sized carburetor or throttle body applications where a tapered filter isn't necessary, K&N offers the 66-3330R and 66-3320R Drag Racing Base Mount Scoop Filters. Both of these assemblies have a 9 inch outside diameter air filter and X-Stream Air Flow Top. The manufacturer also positions it to protect the motor in a drag car from dust and debris on the track and in the pits. Choose it over a generic scoop element when you need a fitted, engineered assembly for a 7.313 inch neck. A 3-inch-tall element also suits tight scoop packaging. The 66-3300R incorporates a lower-profile baseplate than the 66-3310R, which helps ease fitment in applications with cramped quarters around the air filter.
For a 5 1/8 inch flange, the manufacturer points elsewhere: run the K&N 66-3340R Drag Racing Base Mount Scoop Filter. The manufacturer lists up to 99% efficiency for this assembly. Drag builders searching for a Dominator scoop air filter with X-Stream top, 7.313 inch neck flange, or K&N 100-8505 scoop compatibility will find this part matches those terms. Its 1.7 lb weight makes it a light, simple swap compared with taller assemblies.
The manufacturer specifies use with the K&N 100-8505 Scoop or the Harwood 3158 Scoop.
No. The manufacturer directs 5 1/8 inch neck flange setups to the K&N 66-3340R Drag Racing Base Mount Scoop Filter instead.
The manufacturer states the 66-3330R uses a 3 inch tall filter, while the 66-3320R uses a 5 inch tall filter for more airflow.
The manufacturer rates this assembly as an easy install, estimating about one hour with a wrench and provides an installation instruction sheet. Since the sheet is the authority on torque and sequence, read it before starting. K&N's instruction sheets for comparable X-Stream custom assemblies say it is imperative that no part of the X-Stream top comes into contact with anything on the vehicle at any time. Check hood and scoop clearance with the top installed before closing the hood. Owners on user forums stress that if the scoop is not sealed properly it will actually draw fuel out of the carburetor, so seal the base and inspect gaskets carefully.
