Need Down pipes for Thorton Dual manifolds

[Tango 20]

Installed a 330 olds with Thorton Dual 2 1/4" Manifolds. Need some recomendations on what downpipes to start with. This is for a 1986 Buick regal. Thanks

 

[CMCE]

Installed a 330 olds with Thorton Dual 2 1/4" Manifolds. Need some recomendations on what downpipes to start with. This is for a 1986 Buick regal. Thanks

Use Pypes downtubes DOF10S
https://classicmusclecarexhaust.com/p/pypes-65-72-olds-downpipes-400-455-pypdof10s

 

[Tango 20]

Thanks. That what I used. Worked pretty well. Had to make an adjustment around the Trans Linkage. Sledge Hammer

 

[olds307 and 403]

Glad these worked for you. There have been improperly bent pipes from Pypes on multiple vehicles, including those downpipes. Those probably match manifolds the best as far as outlet size. For the Thorton shorty headers, especially the new ones with 2.5" outlets these will probably be a better match if they clear everything on a G body. I saw a pic installed on a late 70's Trans Am, nice mandrel bent pipes. The pic shown isn't what the pipes look like.https://www.ramairrestoration.com/sho-6-2-5-mandrel-bent-headpipes-flanges.html

 

[Tango 20]

Passenger side was perfect. Drivers side need a couple blocks of wood and couple of wacks with a 12 lb sledge. Barnyard Repair