I remember, way back in the old days, we used to run open headers on our cars. We would have either no exhaust pipes or very short ones that ended at the doors. They were very loud but I don't think they made the car faster, just loud as he11. How would that affect our cars? I think open headers became illegal in the 70's but we still ran them in the 80's. Any ideas? To date myself, I could climb into the engine compartment of my first car to work on it.