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Is the 06 exhaust diffrent than the 04-05? did your exhaust bolt up to the factory manifold, did your header bolt up to the exhaust? Were there fitment issues?
 

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there are no differences
 

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Pzev has an extra o2 sensor. Not a cat. Its got an extra muffler too. The gas tank is moved alittle, so there is a bend that needs to be longer for exhausts (vibrant specifically)

So other than having a shop cut and weld in alittle more to that one section of pipe, and adding an extra o2 sensor, (certain exhausts) it will fit.

Pzevs are mainly in the Green states, easy way to tell is look under your hood and see what emissions system the specific car complies with. It will say Pzev, on the white sticker.

The header will bolt up perfectly. I had a header on my car awhile back, and had no fitment issues with it.
 
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