Vehicles with out Overkill Supercharger will use one of the two couplers listed below. If you are not sure if you need the straight or 90*coupler send us a picture and we can determine which one is needed for your application.
3.5”x 3.0” Straight Coupler
3.5” x 3.0” 90* Coupler
For vehicles with the Overkill Supercharger use 3.5”x3.5” 90* coupler