[grandam1979]

64speed how did you get a set for d ports I have only seen round ports?

[TCSGTO]

It looks like the obx versions are selling for around $300 and the knock off of the knock off is selling for $150. I bought a set of “Maximizers” for around $150 and they look different from the obx pictures. The obx’s have smoother looking bends coming off the head flange than the ones I bought.
I had the same end hole alignment issues and had to dent the passenger side pipe where it goes over the front crossmember. I also had to make a slight ding to clear the drivers side rear control arm bracket.
The collector flanges are parallel though. The Hedman Hustlers they replaced had one collector pointing up and inward. The other pointing straight back but downward. Made hooking up an x-pipe more work than it should have been.

[ERIC AULL]

I bought the OBX Stainless round port headers for A body a few years ago....They needed a little 'adjustment" as the passenger side touched the tranny pan (4l80e)....I cant comment on stock chassis fitment..but they are a quality header...thick flanges...nice welds...I paid $189 on E-Bay....Sorry the pics aren't that great....

[64speed]

I meant round port. I just mocked them up to the d port head on the 455.