I purchased a set of Flowtech 31108 headers for my build (Chevy performance SP350 crate engine) at the suggestion of FFR and these headers are trash. Bad quality welds, bad quality coating, and the flange face is killing me with exhaust leaks. Does anyone have any suggestions for alternate headers that fit with the FFR exhaust to a sbc 350?

One added complication is that the heads on an SP350 are "fast burn" heads which are actually D-Port and not oval. I have had limited success getting my oval port headers to seal against them, but since the head ports are smaller than the headers, the main issue is quality of the sealing face on the headers. Just wondering if anyone has found a better solution or alternate headers that fit with the SBC adapters that I can take a look at.

Thanks

Darth