I have a Big Gun pipe and the header bolts won't stay tight. The bolts have anti-seize lubricant on them currently. Big Gun told me I should use a high temperature loctite and that this would also serve as anti-sieze lubricant??? I have not been able to find such a product. By the way, if I simply torque the bolts tighter, they bend the mounting flange. Another factor is that the studs may be too short, because I can't torque the studs in place all the way prior to attaching the nuts because there isn't enough stud sticking out of the flange for the nut.

 

i have a big gun full exhaust. when i first bought it and put it on it loosened and leaked. i found out that the header pipe had been changed slightly from early production. so i sent it back they sent me another one and it works fine. the flare at the end was to small. so when i tightened it down it wouldnt line up totally and it would bend the flanges and then loosen. all i did was call them and say this thing doesnt fit right.