exhaust diameter?

[conley3.1]

Does anyone know the exhaust diameter for a 92 3.1 Lumina? Mine is at the shop right now, engine swap. I want to put on an exhaust cutout, so i need to know the diameter, and I haven't had a chance to measure it lately. Thanks.

[99RegalGS]

On my regal It's 2.5" going into the cat an 2.25" after the cat. I have a 3800 so it might be different, but it should be close if it is.

[Redfox340]

After the cat on a 2.8L / 3.1L pushrod motor, it is 2.0"

PhantomFE3, Robby, anyone... wanna spot check me on that?

 

- Erik

[Robby1870]

After the cat on a 2.8L / 3.1L pushrod motor, it is 2.0"

PhantomFE3, Robby, anyone... wanna spot check me on that?

 

- Erik

 

I agree, 2.0 after cat on 2.8/3.1L

[conley3.1]

Okay, thanks does anyone know about before the cat?

[phantomFE3]

its the same before the cat, im pretty sure. what do you have planned? dual exhaust?

[4spdz34]

i thought it was 2.25 before the cat and 2 after it

[conley3.1]

I wish dual exhaust. No, just an exhaust cutout Loud and annoying.

[fleetwoodguy79]

2" before and after the cat. 3.4's are 2.5" all the way back.

[conley3.1]

thanks. Now if i can only find a 2" cutout... All i can find are the flue/flew (sp) type, i want a simple remove-the-wing-nuts kind. I think the flue type would probably wear out quickly, just like the chimney kinds do. Any experience with them?