I can't find the part number for hedman headers with air injection that are ceramic coated and the part number for the coated y- pipe. Hedmans website is useless as is the tech dept email. I looked at the header selection chart on this thread but with the ads on the side it distorts it and I can't figure out the ones I want. The car is a 91 with a 305 and anautomatic. any help is always appreciated.