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[dans86]

im looking for a header for my 720 i have a Z24 motor

[Z-train]

Complete waste of money.Use your existing manifold and a 2 inch head pipe with a good muffler and a 1 3/4 tail pipe.

[datzenmike]

Yeah the Zs don't breath enough or rev high enough to really benefit from one. Your manifold is 4 into two, with a 2 into one down pipe that's 2" diameter into the cat. The pipe behind the cat is 1 3/4" so replace it with a full 2" all the way to the back. If you don't have smog checks you could loose the cat too.

 

You probably won't notice any difference but you will know that you have a new low restriction system.