ok Saturday night we went to a new track and we decided to run a loop pipe their and went I put it on he seemed to not make as much power compared to when we run muffled like we did every week does anyone know why this is happening also just to show he has lost power on his rpm tach when we ran muffler on 1st heat he was turning 5641 went to loop only 4792.
is this a cam lift issue or something?
is this a cam lift issue or something?