“I changed out the standard 2006 STI headers for this unit. The quality was superb, came with the replacement gaskets and fitted with no problems. I was super happy. I was amazed at the difference these headers made to the car. The rumble is a little less pronounced (neutral), and the overall volume of the exhaust is lower (good), but the smoothness of the engine power delivery and the overall drivability has improved significantly (excellent). I never thought a difference in headers could make driving the car more of a pleasure to drive, but it does. 10 out of 10. If you are thinking of changing your headers then this set are outstanding and worth every cent. Prospeed delivered their normal excellent service.”
