My rubber elbow is as common rather torn in the end towards the TB, and I've been looking for replacements.
Is there any difference on this part within 93-97 LT1's?
This Doorman looks right but Amazon claims its a no fit for a 96 Camaro while same item on ebay say its a ok fit?
I did notice on another website saying the OEM 25147210 (as in this listing) was only for 93-95 while the 25147187 was correct for 96-97 due to the vented Opti, haven't been able to figure out why though...
Only 25147210 seems available from what I have found so far

 

the 96-97 have a extra hole for the opti to draw air for venting.

 

Thanks Craby, just the info I needed to keep going

My current elbow doesn't have that hole which it should being a 96, so either if some of the earlier owners have used a non vented Opti, or even replaced the whole engine with a 93-94 LT1, will try to locate the vent intake on the Opti to see if there is one, its a red MSD unit btw, also need to locate the engine number to compare with the VIN

 

it may be taking air from the intake between the elbow and the air filter I am using an aluminum elbow that I picked up because the rubber one was torn. nicer looking. I have moroso cold air intake and I drilled a hole in it and threaded it for a hose fitting to use the vented opti in my 93

 

Seems I have the vented Opti but who ever installed it though the pluming was surplus , another thing to add on the todo list sigh....


Opti air connections

 

yes, I saw your setup in another thread, was looking good
The aftermarket solutions I have found so far are over the price of the original rubber, so I think I'll aim for such

 

Found the Opti air connection on the intake to be plugged, so previous owner deleted the pluming on purpose obviously.
So the option being a 93-94 engine is off
I

 

Seeing the price on a new harness makes it more understandable why they were left out

Stroke my mind that the ventilation might (at least partly) be environmental based as the Opti creates ozone

https://gen4camaro.com/shop/ols/prod...harness-nos-gm

 

wow used to be half that cost... not that long ago.

 

last thing you want is the opti open to the outside air. moisture gets in it and end up with unhappy opti.