Grill's are not proprietary unless there very high end home units, they simply don't test them to any degree (that would be expensive). So it's all visual aesthetics. I mean, who is going to put a sonically correct, 'butt ugly' grill in there car?
Steeda SRI w/CAI intake. Trubendz SS 2.5" . FR Susp/Struts. Tune by Tom (FocusPower). Rota Grids. SAP rear spoiler. Custom front air dam, rocker panel bits and Rear valance.
Last of the Hatches #28