another header leak

the problem with cheap headers is the flange is thin(5/16) and warp easily. good headers will have 3/8" thick ground flange, the tubes will be slightly inset with full perimeter welds on both sides. i have headmans on my truck(already there when i bought it) and the passenger side leaked like hell at the two center dumps. cut the flanges, put hi temp copper rtv and copper header gaskets and tightend the crap out of the bolts. no more leaks. also for collecter gaskets i use dead soft aluminum to conform to the irregularties. no leaks there either. my .02 mike t