JET HOT HEADERS
The headers make a car sound 100% better in my opinion. I don't have tuning yet and I gained about .25 and 2.5 mph in the quarter, probably almost 20 hp. Great mod.
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I second the fact that they fit up close to the bottom of the car. My JEt hots w/ catted y are in. I am just waiting for my O2 extension for the rear passenger cat. I will be trying not to run O2 sims.
Basically you need 2 24" o2 extensions for the fronts and one for that back passenger if you arent running sims.
I hope my headers and y dont bang. I did install a poly motor mount on the drivers side while the manifolds were out. I hope it will give the stiffness I need not to bang.
The Y-pipe was a little close on the drivers side, so i made a cushion of high temp rubber hose and a large clamp. Could probably bend the Y-pipe down a little and stop it, but haven't really tried. 



