If you look at the photo in the first post, the third one down. You will notice that the gasket is much lower than the hole in the pipe! The KERMA hammerheads will match up to that gasket. So you will clearly see that by moving the pipe upwards, it will be severely obstructed. That is why the hammer and hammerhead turbos match the factory pipe 100% correct! They are port matched to that configuration. They will fit all factory downpipes and most aftermarket ones but not this one.MikeS_18 said:I'm confused. Hammerheads don't match up with stock downpipes?