Hello trying to get this out there to save some money and heart ache for others. I am on my second first gen tundra and love them! I bought JBA headers for my 06 DC and they were off from the beginning, bolt holes had to be ground out but got them on using factory nuts and Remflex gaskets. Drivers side leaks like crazy, so looking a a thousand to have factory manifolds put back on. DO NOT BUY JBA and waste your time, knuckle skin and money.