B Jake Moran Posted April 2, 2019 Share Posted April 2, 2019 https://mankato.craigslist.org/pts/d/3800-exhaust-manifold-new/6826576889.html I don't suppose by any chance this would fit Reatta era 3.8's?? New in package front (left) side exhaust manifold to fit a 3800 series II or III, most 1995-2005 Park Avenue, Bonneville, Regal, Lesabre, Riviera, 88, LSS, Monte Carlo, Impala, Grand Prix, Intrigue with a 3.8L. Includes gasket and flange hardware. Greywerks brand part number 101273. $40 OBO 101273 674-540 2109-259583 961599 Link to comment Share on other sites More sharing options...
2seater Posted April 2, 2019 Share Posted April 2, 2019 No, it will not fit. The Series II ports are evenly spaced and the LN3/L27 are not. Pretty much why Series II heads won't work on the Series I also, the valves are in a different order, and the deck of the block is nearly 1" shorter. Link to comment Share on other sites More sharing options...
B Jake Moran Posted April 3, 2019 Author Share Posted April 3, 2019 Dang it, that seemed like a good deal. I wonder? If Rock Auto or anywhere else might have some NOS Reatta LN3 / L27 exhaust manifolds for cheap. I'll have to go check. It's not like they really go bad, it's more for appearance and like new fit and performance. Thanks Link to comment Share on other sites More sharing options...
DAVES89 Posted April 3, 2019 Share Posted April 3, 2019 You need to find a 5000 mile engine like I did in a salvage yard in Rhinelander Wisconsin... Engine was not sealed and was all corroded in the cylinders, but there was a lot of free parts for 2seater and me as the guy gave us the engine for free. Link to comment Share on other sites More sharing options...
2seater Posted April 3, 2019 Share Posted April 3, 2019 1 hour ago, B Jake Moran said: Dang it, that seemed like a good deal. I wonder? If Rock Auto or anywhere else might have some NOS Reatta LN3 / L27 exhaust manifolds for cheap. I'll have to go check. It's not like they really go bad, it's more for appearance and like new fit and performance. Thanks No, they generally don't go bad, they are a low grade 400 series stainless steel. For appearances, just have the existing ones ceramic coated. I use satin black for turbo piping, which is pretty much a temperature requirement, or titanium gray for naturally aspirated, but lots of colors are available. If coated inside and out, the heat shields can be eliminated in some areas. Link to comment Share on other sites More sharing options...
Blue90 Posted April 6, 2019 Share Posted April 6, 2019 Here's the same side exhaust manifold from a '90 Reatta. Link to comment Share on other sites More sharing options...
2seater Posted April 6, 2019 Share Posted April 6, 2019 This is a quick photo of a complete set done in about 2001 in titanium gray. The crossover pipe is somewhat obscured by the manifold on the left. The darker gray is the modern take on the same color and has not been installed or run yet. The dark gray one is heavily reworked in the area of the exhaust outlet to eliminate the turbulence where the exhaust from the front and rear exhaust ports run into each other at the outlet. Link to comment Share on other sites More sharing options...
Barney Eaton Posted April 6, 2019 Share Posted April 6, 2019 Can you show a top view of the modification to the dark grey header? Looks like you greatly spread the opening where they intersect. 1 Link to comment Share on other sites More sharing options...
2seater Posted April 6, 2019 Share Posted April 6, 2019 Not a lovely creation but should be better within the original design envelope, maybe sound a touch different? 1 Link to comment Share on other sites More sharing options...
Barney Eaton Posted April 7, 2019 Share Posted April 7, 2019 Nice job, looks like a lot of work. 1 Link to comment Share on other sites More sharing options...
2seater Posted April 7, 2019 Share Posted April 7, 2019 2 hours ago, Barney Eaton said: Nice job, looks like a lot of work. Thanks. Just done as an exercise for an obsolete engine family to see what could have been😐 Link to comment Share on other sites More sharing options...
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