I have a hayabusa powered sandrail with a stock header that I had to split into two. The X pipe at the end is gone already and it goes to the stock mufflers. My question is can I cut the crossover pipe between the inner two cylinder out and plug weld the holes? What affect will this have? I have seen aftermarket headers that don't have it. Right now it's cut in half and I sleeve it together after I install the header. It would be much easier without it! Gen 1