I had run it without the intake with no difference. I haven’t tried the exhaust. I’ve put several hundred miles on the car, hoping it would clear up but it hasn’t. I’ve been waiting for a chance to replace the valve stem seals and part of me thinks I shouldn’t spend time or money until I do that. Most of what I read are smoke issues, but would the seals affect performance? My indy doesn’t think they’re responsible for the glow plugs, but could they be messing with my fuel/air mixture?