Flange hole: 12mm(approx) Through hole (no thread).
Inlet Flange: T3 T3/T4 turbo Flange (72mmx48mm approx).
Description
Merge collector is made from T304 stainless steel schedule pipes for superior strengh and durability. Each pipe is precision cut so, when fully assembled, they come together to create a proper merge for maximizing exhaust gas flow efficiency and minimizing turbulence.