Quat D Exbox for an S4

[wylliecoyote]

Can anyone out there tell me if i need to install and run a power commander to fit this exhaust system to my 02 S4? Any help would be much appreciated.

[Dement]

Don't think so. With the S4 a re mapped ECU is needed when you open up the airbox. Slip ons shouldn't harm the air/fuel ratio. Check with Brad Black and the Moto One Performance notebook and/or refer to LT Snyders' manuals.