Headers for my 318

You guys forgot about the Doug's headers. Cost about ~$550 and summit racing carries them on hand. The part number you need is 453.
Both TTi and Doug's fit the best just that Doug's are cheap and use a 1 5/8 in tube while TTi uses a step 1 5/8 to 1 3/4 tube, both use a 3" collector.
Also so the 453 are coated already.