Anyone have these things? I think they are hex head, they screw into the heads and take the place of the EGR injectors. I know I've seen them sold, but don't remember where.

Any clues appreciated.

I'll be interested to see if anyone chimes in...I would love to find a clean looking plug for the smog ports. The best solution so far that I have read about is getting brass caps in any plumbing supply store. The caps screw on rather nicely to the short smog taps that go into the heads.

Donno the required length so I guessed at 16mm to get you a part number in the ball park. Explore in this area for varying lengths as required.

<http://www.mcmaster.com> part number 99642A160
Metric Alloy Steel Cup Point Socket Set Screw M10 Size, 16mm Length, 1mm Special Pitch
In stock at $8.63 per Pack
This product is sold in Packs of 5

or just start at 'set screws' on the main page and drill on down.

I used valve adjuster screws and jb weld.