Which type header is this?

[XfireZ51]

Are these DRMs?

[Sgreg]

If the tubes are 1 7/8", they could be Watsons. Not sure if DRM ever made headers with emissions connects. I think Calloway did but I thought they were short tubes.

Watson made both size primaries. With the Air tube fittings and the coating on their they are more than likely Watsons. And they were made for a car with EGR.

[Aurora40]

Originally Posted by Sgreg

I think Calloway did but I thought they were short tubes.

Yeah, they were basically stock manifolds with the pinch removed:

[XfireZ51]

Originally Posted by Jeffvette

Watson made both size primaries. With the Air tube fittings and the coating on their they are more than likely Watsons. And they were made for a car with EGR.

Jeff,

I have now been informed they are 1 7/8". Supposedly off a 91. Are the 2" primaries worth the difference? Are these headers worth it?

2" if you plan on doing more in the future. The 1 7/8 are fine for a stocker. Might be a few ponies left on th table.

Ask him what he did to seal up the EGR port.

[XfireZ51]

Originally Posted by Jeffvette

2" if you plan on doing more in the future. The 1 7/8 are fine for a stocker. Might be a few ponies left on th table.

Ask him what he did to seal up the EGR port.

Jeff,

Well I've got ported IHs, looking to port gcylons plenum, ported TB, add Fidanza FW and do some tuning. So maybe I'll stick with the 2". Eventually, I'll do the heads.

[HIZNHRZ]

The headers look like the Watson headers on my 91...

I'm very pleased with mine. Yes, I think they are worth it.