2000 LQ4 Exhaust (solved - Walker 55556 from 2001 - blueprint verified)

[gatesl]

Hi everyone. My stock 2000 LQ4 exhaust has a cracked flange on the passenger exhaust downpipe that I am trying to find the right part for. OD on the OE pipe is 2.5 until after the O2 sensor, then it's welded to a 3.0 OD pipe. I think this was a factory exhaust in 2000 due to the towing RPO code I ordered it with, and the HD model was introduced in 2001. I am trying to find a direct replacement part and having a hard time.

It appears the MagnaFlow BRExhaust Direct-Fit Exhaust Front Pipe Kit 107-0260 is close, but specified as 2.75 inch ID on the outlet which I think is a 2.87 OD. The Walker 55334 is 3" inlet and outlet. Does anyone know of a direct-fit that is 2.5 OD at the exhaust manifold flange end and 3.0 OD at the cat flange?

 

[Marky Dissod]

Would it be of any help if I suggested you examine LQ9 exhaust parts? If not, please ignore.

 

[AuroraGirl]

Would it be of any help if I suggested you examine LQ9 exhaust parts? If not, please ignore.

some years lq9 have different exhaust manifolds. show yours just for the fun of it

 

[Marky Dissod]

some years LQ9 have different exhaust manifolds. show yours just for the fun of it

My Tahoe has a mere L59.
I was merely suggesting a likely, compatible GM OE part, that could also be an upgrade.