Doug's Tri-Y Headers on 4wd Blazers - The 1947 - Present Chevrolet & GMC Truck Message Board Network

tjsblazer · 02-03-2014, 03:58 PM

Who here has a set of Doug's Tri-Y headers on their 4wd Blazer (part#D372Y). Looking for feedback. Think they are essentially the same as Doug Thorley's design (THY-372Y-C). So either one.
Someone on here is running them. thanks.

**AsianBlazer** · 02-06-2014, 03:57 AM

I have Doug Thorley Tri-Y's on my Blazer, however, its an 81 2wd! They are great, much better performance than the Hooker Super Comp's I had before. Fit and finish are excellent. Also spent the extra on Stage 8 Header bolts. Hope this helps.

tjsblazer · 02-06-2014, 04:30 AM

Quote:

Originally Posted by AsianBlazer

I have Doug Thorley Tri-Y's on my Blazer, however, its an 81 2wd! They are great, much better performance than the Hooker Super Comp's I had before. Fit and finish are excellent. Also spent the extra on Stage 8 Header bolts. Hope this helps.

The part about the fit and finish does, however, I am looking for some pictures of them for alignment in comparison to the transfer case crossmember. Think I'll ask on the truck forum. More potentials there.

thanks though. they do look great in that engine bay !!

Are they angle or straight plug heads? Any issues with plug wires?

swamp rat · 02-06-2014, 06:06 AM

PM Replied too.

02-03-2014, 03:58 PM	#1
tjsblazer Registered User Join Date: Oct 2009 Location: Great White North Posts: 1,520	Doug's Tri-Y Headers on 4wd Blazers Who here has a set of Doug's Tri-Y headers on their 4wd Blazer (part#D372Y). Looking for feedback. Think they are essentially the same as Doug Thorley's design (THY-372Y-C). So either one. Someone on here is running them. thanks. __________________ Jeff. '72 Blazer K5 "Camshaft opinions are like belly buttons; everyone has one and no two are alike" My Blazer Build: http://67-72chevytrucks.com/vboard/s...d.php?t=626752 My Engine Build: http://67-72chevytrucks.com/vboard/s...d.php?t=637336

02-06-2014, 03:57 AM	#2
AsianBlazer Active Member Join Date: Sep 2009 Location: Juneau, Alaska Posts: 132	Re: Doug's Tri-Y Headers on 4wd Blazers I have Doug Thorley Tri-Y's on my Blazer, however, its an 81 2wd! They are great, much better performance than the Hooker Super Comp's I had before. Fit and finish are excellent. Also spent the extra on Stage 8 Header bolts. Hope this helps. Attached Images

02-06-2014, 06:06 AM	#4
swamp rat Registered User Join Date: Oct 2007 Location: Spanaway Posts: 8,451	Re: Doug's Tri-Y Headers on 4wd Blazers PM Replied too. __________________ Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's



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