Phenolic heat spacer?
 

My question concerns the availablility of a phenolic heat spacer for a 3.8liter v6. Are they making them for the 94-98 models? If so, where can i purchase one? The next concern that i have are the bolts holding the upper intake manifold in place. Will using a phenolic spacer retain the factory bolts? I'm assuming they will, as there seems to be enough length on them. And my last question is regarding the runners. With the slight hieght increase, will i see some hp gains from this? Would it effect the ECU? Any help would be greatly appreciated, thanks.:D