I had the same problem with a set from them. Used SPEEDWAY extreme gaskets and sealing problem was solved. And SPEEDWAY says they are re useable = GOOD LUCK! Mikey,
I have two av8's with Sanderson headers and haven't had a leak problem, a friend also has two av8's and no problem with his either. I use just a smear of high temp rtv on the sealing area when installing.
My $0.02 is two Sanderson header installs with no gaskets other than their high temp goop and no leaks in a couple years.
I have Sanderson Limefires on my 27 and have always used header gaskets on them. Every few years they dry up and crack and I just replace them, but I get no leaks when the gaskets are not aged. I know their ads say no gaskets needed, but I am just old fashioned. Don
use red atv on heads let set for a few minutes then bolt on headers, never had any leaks and I run mine wide open for a 1/4 mi at a time.....
im done.. put the extreme seal gaskets on..not much better, they are coming off, hedman fenderwells going back on..