Is it possible that a new high flow muffler would cause higher oil pressure? Sounds like a stupid question but just seems like i'm getting a higher reading when I get on the throttle since I put on the new muffler. It could be that im gettin more in to it because of the new sound, I just don't know. I'm getting about 45 at idle and goes to 60 to 65-70 about 3/4 throttle. Is that within range or a little high?