91L98Z28

Has anyone failed smog in the past year or so due to not having an EO number stamped into their SLP (or other brand) smog legal headers? Apparently this is a change in law in the past year or so.

Any ideas for how to get around it? I'm not sure what will fly with the average smog tech...

84 1LE

iTrader: (9)

Happened to me 5yrs ago w/ edelbrock headers.Tried 3 different smog stations, no way around it (for me anyway).Ended up sourcing a used later set that had the number stamped on the header & problem solved.Also went thru this w/ my s10 the next yr too.I just went back to manifolds on that one.

Kevin91Z

iTrader: (1)

I had a similar thing happen to me the last time I went to smog. I think the shop was just trying to shine me off. They don't want to do OBD1 cars anymore because its a longer test and more involved than just plugging in the ALDL connector and letting the computer do all the work.

You have to find a mod-friendly smog test shop. Good luck.

TTOP350

iTrader: (8)

Didn't SLP have a welded on tag on later production headers?

91L98Z28

Mine has one, but it just has SLP stamped into it - nothing further.

I'm considering going to a laser engraver to get a professionally done engraving of the EO number and part number, but there isn't much extra space on the tag. I could fabricate a whole new tag, but then it will never match the coating/finish on the headers, and it might look "faked". Otherwise, added cost to strip and re-finish the headers.

I've played along with a lot of CA smog laws and saw that they made some sense, but this one really irks me. I paid good money to comply with smog legality with these SLP headers, and the state knows full well that they didn't require stampings in the headers before; so there is decades worth of headers out there that are not marked but are in fact smog legal headers. I don't understand how this hasn't affected every make and model across the board from honda to ford to our GM stuff...

92rszz4

This may be a dumb question but I have a pair of Dyno Don's headers and I can't remember if they have a stamp but they are smog legal. Do I need to do any work to Dyno Don's Headers?

6998poncho

This is an interesting development. I have Borlas on what I call my "third.gen"; it's my '89 Chev K1500 EC. I've had these headers on my truck for over twenty years with no tag. I have a smog shop that I've been going to for the last fifteen years at least that is familiar with my vehicle and they haven't made it an issue. I had a bit of trouble with my '98 Firebird when I swapped an LS6 into it and I finally got my ECM reprogrammed so I didn't get the intermit codes that had failed me on a test two years ago. I may have to e-mail Borla just in case...

MY87LT

iTrader: (2)

My SLP headers do not have anything on them and I always get crap from the Smog place. SLP at least sent me an under hood decal with part numbers and C.A.R.B. number the shops still give me grief.

84 1LE

iTrader: (9)

What pisses me off about this, CARB requires us to have the EO number on the header, but manufactures are given EO certification w/out this required #'s stamped on.

AstroFirebird

iTrader: (1)

Old thread I know, but I’m having this same problem here in SoCal. I have a set of one of the unmarked SLP headers and the smog shops are giving me issues even with the original sticker and a receipt for the headers from ‘99. Anyone got any recommendations on what to do?

MarineIROC

I went through this with my '89 Z28. No stamp on SLP headers 1 3/4" with dual cats - Part# 30003. EO D-187-10. Smog dude referenced a binder with listing of EO's by device. If I remember right, sometimes EO's expire or there are revisions. Call SLP, pay nominal fee for them to mail a new EO decal. Stick it on the car. Arriving with decal in your hand won't work. Similar experience but, with Gibson exhaust. Expired EO number. Drove out to Gibson for new EO. Replaced old decal. Passed.

AstroFirebird

iTrader: (1)

The EO number itself wasn’t the issue. That checked out fine. The issue I was having is that the smog places said they didn’t have any way to confirm that those were the same headers the EO number covers, even though they knew that a lot of older headers had no markings at all.

MarineIROC

Perhaps go through state referee?

84 1LE

iTrader: (9)

But you can still buy C.A.R.B approved headers with an adhesive EO label. You just can't use em and pass the smog test, the irony!
The only solution carb was able to give...swap back to stock manifolds. Which I ended up doing. Both on my 84 and my 99 s10.

zman1969

iTrader: (9)

Would stickers like this help?