I am installing new headers and am curious as to what guys are using for exhaust stud sealant on cast iron (452) RB heads?
I have Ultra Black silicone and also Pneumatic/Hydraulic sealant but dont think it will hold up to the temps..
I tried the Ultra Black on a couple studs and after drying over night didnt feel like it was holding up, loosened up with minimal effort.
Want a tight leak proof seal!
Any other options is appreciated.