How much is the Cold Air Intake Manifold Insulator for Ford EA-AU 6 if I picked up the item? Also when fitting the item do you need to modify the water pipe bracket? If I purchase this would there still be need for the split manifold spacer?"

The price would be the same as advertised as our eBay starting price. No, you don’t need to modify your water pipe bracket when fitting this. You can still run the upper manifold insulator if you wanted to for even greater gains. However the lower of the two spacers is the better one to go for however it involves more work to install then the upper one.