Does Illinois allow you to alter or modify your car exhaust to make it louder? Here’s what to know. Photo by Khunkorn Laowisit: If you drive often around the metro-east or across the river into St.
(WTAJ) — Loud aftermarket exhausts could be a thing of the past in Pennsylvania if the SLEEP Act were to become law. The SLEEP (Stop Loud and Excessive Exhaust Pollution) Act would ban aftermarket ...