conley3.1 Posted October 14, 2003 Report Share Posted October 14, 2003 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. Quote Link to comment Share on other sites More sharing options...
99RegalGS Posted October 14, 2003 Report Share Posted October 14, 2003 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. Quote Link to comment Share on other sites More sharing options...
Redfox340 Posted October 15, 2003 Report Share Posted October 15, 2003 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 Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted October 15, 2003 Report Share Posted October 15, 2003 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 Quote Link to comment Share on other sites More sharing options...
conley3.1 Posted October 15, 2003 Author Report Share Posted October 15, 2003 Okay, thanks does anyone know about before the cat? Quote Link to comment Share on other sites More sharing options...
phantomFE3 Posted October 15, 2003 Report Share Posted October 15, 2003 its the same before the cat, im pretty sure. what do you have planned? dual exhaust? Quote Link to comment Share on other sites More sharing options...
4spdz34 Posted October 15, 2003 Report Share Posted October 15, 2003 i thought it was 2.25 before the cat and 2 after it Quote Link to comment Share on other sites More sharing options...
conley3.1 Posted October 16, 2003 Author Report Share Posted October 16, 2003 I wish dual exhaust. No, just an exhaust cutout Loud and annoying. Quote Link to comment Share on other sites More sharing options...
fleetwoodguy79 Posted October 17, 2003 Report Share Posted October 17, 2003 2" before and after the cat. 3.4's are 2.5" all the way back. Quote Link to comment Share on other sites More sharing options...
conley3.1 Posted October 18, 2003 Author Report Share Posted October 18, 2003 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? Quote Link to comment Share on other sites More sharing options...
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