So I just got a brand new 4:1 GReddy header. Unlike the Pacesetter I had a few weeks before, this one didn't come with any kind of gasket that went between it and the motor (came with all the other gaskets, though). I sent the Pacesetter back due to fitment probs, so I have a bone stock exhaust manifold right now. My question is, can I just use the stock gasket that's there, or do I need to buy something to go between my new header and the motor? And if I need a new gasket, where can I get it QUICK (and why didn't GReddy pack one)? I'm supposed to do the install today (along with brand new SP cat back). Thanks in advance for your help!