Reviewed By Doug C (Wilmington, NC) Reviewed for a 2002 Chevy Trailblazer —3/10/2009 2:33 PM
Sound is a little better at idle and noticeably louder at high RPMs. Definite increase in horsepower, especially around 4000 RPMs. Not sure if the gas mileage has improved any. Overall I thought it was worth the money.