Anyone recognize these headers? There are no mfg identifying names or marks on them. the only #'s on them are 115 on one flange, and the other side has 116 stamped in the flange. They came off an early 00-01 5.3 engine, which had all these exhaust system ports on the manifolds for possibly the Sec Air System?

They don't seem to be shorty headers, but are not long tubes either. I'd almost call them a mid-length header, am I incorrect with that assertion? Thanks.

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Look somewhat mid length to me.
Passenger header exhaust port is for the EGR. No idea what the driver side is for.

 

They kinda look like these.

https://www.summitracing.com/parts/h...1500/year/2000

 

All of the ports out of this exhaust are standard on 00-01-ish. Those ports are for EGR and Secondary Air System. Those I'm not concerned about. I'd like to figure out what mfg made these to see if the Y pipe that goes along with them is still available. I don't believe the factory Y pipe will work because the additional length ends right where the factory cats are located if I'm not mistaken. Thanks.

 

Maybe Edelbrock TES? From what I recall, they were a mid length, similar to what you have there.

 

Thanks, I'll see if I can run down a picture of those to ID. Still hoping someone recognizes them with their unique heat shields and knows what they are.

 

The flanges look like the Edelbrock TES headers on my 8.1L 99 Tahoe. It has Edelbrock TES headers for an 8.1L Avalanche or Suburban. No heat shields on them though.

 

I found a set of TES headers for an old 454 with the same style heat shields. In all likelyhood those are part of a TES system. Edelbrock has not made them in years.

 

personally i would weld in some V flanges and have an exhaust shop build you a Y pipe.

 

definitely v-bands on exhaust connections