Joe, I weigh both the header & pipe 7 oz each total 14 oz ,CF pipe 4 oz + 7 oz header =11,savings of 5 oz . Not a big deal on a 18 lbs + aircraft even though I am very weight conscious. What I did not like about the CF pipe is that is very temperature sensitive.By the way I installed a velocity stack as you suggested in previous post everything is bone dry.Keep up the good information.Almost 8000rpm on dle 55 , Vess 22-B just switched to synthetic .