Doug Thorley Tri-Y Headers - The 1947 - Present Chevrolet & GMC Truck Message Board Network

56hotrodred · 02-17-2018, 11:24 AM

So I am getting ready to order a bunch of parts before we head back up to Canada in March!

I am thinking on the Doug Thorley Tr-Y (Summit # THY-300Y-C) and was wondering if any body has any experience with them?

These will be going in my 80 1/2 ton frame and on a GM Ramjet 350 engine.

It looks like they do not include O2 sensors and I will have to cut a hole in the collectors!

I am also going to post on the square body forum.

Any thoughts?

02-17-2018, 11:24 AM	#1
56hotrodred Registered User Join Date: Aug 2007 Location: Mountain View, Alberta, Canada Posts: 415	Doug Thorley Tri-Y Headers So I am getting ready to order a bunch of parts before we head back up to Canada in March! I am thinking on the Doug Thorley Tr-Y (Summit # THY-300Y-C) and was wondering if any body has any experience with them? These will be going in my 80 1/2 ton frame and on a GM Ramjet 350 engine. It looks like they do not include O2 sensors and I will have to cut a hole in the collectors! I am also going to post on the square body forum. Any thoughts?



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