MopaR&D
Nerd Member
So this is completely unrelated to Mopars but my buddy is building a 2.5L GM 4-cylinder to swap in his Miata and bought these headers. He's concerned about the lack of welds on the inside of the tubes to the flange, I said it's probably not a big deal but what do you guys think? Figured I'd ask here since FABO has so much collective engine-building knowledge and everyone is a straight-shooter here.