i bought a used extreme port manifold from a member on here and when i put the gasket on the turbine side to check the porting i saw that it was barely ported compared to stock.

now the runners are all ported and smooth on the inside so there is no issue there.


im just going to buy a carbide bit and gasket match it myself.

first pic is the oem mani, followed by ppi extreme, a side by side shot, and my FP black hotside that was ported properly.


anyone else have this issue?