Talk to a Mustang Expert
Mon - Sun, 8:30 AM EST - 11:00 PM EST

Free Shipping On Orders Over $49. Details

How to Install a Steeda Supercharger Pulley - 2.81in on your 2003-2004 Mustang Cobra

Installation Time

2 hours

American Muscle
Shop Parts in this Guide



Steeda Part #'s 555-3328 & 555-3331

This pulley is designed to press onto the supercharger shaft, as is the OEM pulley. Special tools are required both .to remo􀁣e the onglnal pulley and to Install the new pulley. Improper installation will result In dama􀁤e to both the supercharger and the pulley. We highly recommend this product to be Installed by a skilled professional utilizing the proper tools. Call Steed a at 954-960-0774 for additional information about installation tools.

The replacement of the press-on supercharger pulley for the Ford series superchargers (Cobra, GT500, Lightning and Harley-Davidson trucks) is a simple procedure, but does require that the engine be completely cooled down before removal of the existing pulley or installation of the replacement pulley. It's also required that the pulley be baked in an oven at 400 for 35-45 minutes to ease in installation, or heat the pulley with a propane torch for 1-1/2 minutes 50 a glove is required for install. It is recommended that you execute the removal and replacement of the pulley(s) using the additional procedures that follow. In addition, take a measurement from the blower to the first belt groove in order to ensure proper alignment of the Steeda pulley.

1. You must allow the engine to return to room temperature before removing or replacing the pulley. The best procedure is to allow the car/engine to sit overnight before beginning the procedure.

2. Pre-fit the pulley installer to the supercharger before proceeding to the next step. This will save time and allow the immediate installation of the new pulley.

3. When installing a new pulley, make sure the longer snout is facing the radiator.

Then with the engine at room temperature, heat the replacement pulley in an oven at 4000 for 30-45 minutes prior to installation. Use leather gloves to handle the hot pulley to prevent burns to your hands or other plastic components and painted Items. Install the pulley immediately after removing it from the oven.

Following the above additional steps will insure a hassle free installation and many miles of enjoyment.

This guide applies to Vehicle years: 2003, 2004 and Submodels: Cobra