On N Easton Rd (Rt 611) heading South just past Haring Rd & Curly Hill Rd intersection they used the center turning lane for 500-800 feet speeding to pass the car in front of them (which was directly in front of me). At the red light of Silo Hill Rd, they wildly averted the car in front of them to pass them before coming to a stop. We all passed the Plumsteadville Fire Company, and at the point where N Easton Rd separates from Rt 611, they continued on Southbound 611, estimating they topped 90 MPH passing several cars before they were out of my visual range.