Tubular is the only option I know of. I had a set of the 4v tubes. They have another part that is for 2v heads. They are good stuff. Just like any header though, the factory paint is crap. I ordered mine bare and painted them myself. I recommend this with any header. There is another company that makes the swap header too, but I know nothing about them first hand. I can't even remember the name of the company. I have seen pics. They are a 1 piece design, rather than indiviual tubes like Tubular, and they have a 'ball' type collector. If I dig up the company, I will pass it along. I bought my headers straight from Tubular. I hear they are more expensive from a middle man. I have had 3 sets from them, 69 Chevelle big tubes, Maverick 351c 4v, and Maverick Boss 302. No complaints on quality. I do have a complaint in that I got the Boss 302 headers shipped to me when I ordered Cleveland headers. However customer service was awesome, I didn't realize their screw up for months and when I did, they corrected it without question. Dave
