Help with exhaust manifolds - The 1947 - Present Chevrolet & GMC Truck Message Board Network

not2oldchevy · 06-25-2012, 09:38 AM

Anyone using stock manifolds with a 5.3 in original AD frame? Have a 5.3 out of an avalnche but the manifolds are to wide. Trying to stay away from headers. Any ideas?

BR3W CITY · 06-25-2012, 11:58 AM

look around the section a bit, it comes down to a handful of options. Truck manifolds won't fit, some have squeezed the early f-body headers in, TBSS manifolds fit almost anything, 2010+ ls3 manifolds are similar and work depending on your motor position, doug thorley swap headers work but you don't want headers.

gringoloco · 06-25-2012, 01:53 PM

Trailblazer SS are a good option for most. I just so happen to have a set for sale...

mcmlxix · 06-26-2012, 01:43 AM

TBSS manifolds are tucked in more then the ones you have. 04/05 GTO manifolds look to be tucked into the motor better AND only use two studs to the collector is more narrow then the truck tsyle with three studs. The late model Camaro manifolds are also an option. I will try and get all the GM part numbers together....

I believe these are the Camaro part numbers: 12611640 and 12611641... you can see them in this post HERE

OKGMC4 · 06-26-2012, 06:19 PM

Corvette manifolds look and work alot like a 4 into one block hugger. They are stainless instead of cast. Worked out great for me.

mcmlxix · 06-26-2012, 08:50 PM

Quote:

Originally Posted by OKGMC4

Corvette manifolds look and work alot like a 4 into one block hugger. They are stainless instead of cast. Worked out great for me.

If those are stainless, they are off the Z06 Corvette with the LS6 motor. I would guess 2001-2004 because they changed the design in 2005... They are probably a little harder to find...

Do you have any casting numbers or part numbers?

OKGMC4 · 06-26-2012, 10:41 PM

These are 97-99 vette. The Y2K cars went to a cast iron manifold with a heat shield. After 05 I'm not even sure what they came with. I got these on ebay for $75 years ago and there's a pair on there right now for $89.50

http://www.ebay.com/itm/GM-CHEVY-GEN...f6651e&vxp=mtr

I hope that helps.

06-25-2012, 09:38 AM	#1
not2oldchevy Registered User Join Date: Sep 2009 Location: east tennessee Posts: 158	Help with exhaust manifolds Anyone using stock manifolds with a 5.3 in original AD frame? Have a 5.3 out of an avalnche but the manifolds are to wide. Trying to stay away from headers. Any ideas?

06-25-2012, 11:58 AM	#2
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: Help with exhaust manifolds look around the section a bit, it comes down to a handful of options. Truck manifolds won't fit, some have squeezed the early f-body headers in, TBSS manifolds fit almost anything, 2010+ ls3 manifolds are similar and work depending on your motor position, doug thorley swap headers work but you don't want headers. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

06-25-2012, 01:53 PM	#3
gringoloco A guy with a truck Join Date: Sep 2005 Location: Germany, for now Posts: 5,921	Re: Help with exhaust manifolds Trailblazer SS are a good option for most. I just so happen to have a set for sale... __________________ -Chris Instagram _elgringoloco_ '70 Short-Wide How to: Ruin a perfectly good C10 ‘70 Blazer ConversionHow To: Ruin a Perfectly Good 4wd '72 Highlander How To: Ruin a Perfectly Good K/5 (SOLD) '72 Blazer 2WD How to: Ruin a perfectly good Blazer (SOLD) '05 Yukon Daily Driven (not so stock) Yukon (SOLD) ‘07 Yukon Denali (daily) Members met list: SCOTI, darkhorse970, 67cheby, 67cheby'sGirl, klmore, porterbuilt, n2billet, Fastrucken, classicchev, Col Clank, GSFMECH, HuggerCST, Spray-Bomb, BACKYARD88, 5150, fine69, fatbass, smbrouss70, 65StreetCruiser, GAc10boy

06-26-2012, 01:43 AM	#4
mcmlxix Collector of Projects Join Date: Apr 2003 Location: Las Vegas Posts: 3,106	Re: Help with exhaust manifolds TBSS manifolds are tucked in more then the ones you have. 04/05 GTO manifolds look to be tucked into the motor better AND only use two studs to the collector is more narrow then the truck tsyle with three studs. The late model Camaro manifolds are also an option. I will try and get all the GM part numbers together.... I believe these are the Camaro part numbers: 12611640 and 12611641... you can see them in this post HERE __________________ Rich 1972 K5 Blazer CST Click HERE D60 BIG BRAKE UPGRADE Click HERE Last edited by mcmlxix; 06-26-2012 at 01:54 AM.

06-26-2012, 06:19 PM	#5
OKGMC4 Registered User Join Date: Oct 2009 Location: Broken Arrow, OK Posts: 1,245	Re: Help with exhaust manifolds Corvette manifolds look and work alot like a 4 into one block hugger. They are stainless instead of cast. Worked out great for me. Attached Images __________________ 56 GMC BUILD THREAD: http://67-72chevytrucks.com/vboard/s...d.php?t=368649 69 long bed Chevy turned 67 gmc jimmy roadster: https://67-72chevytrucks.com/vboard/...d.php?t=851167

06-26-2012, 10:41 PM	#7
OKGMC4 Registered User Join Date: Oct 2009 Location: Broken Arrow, OK Posts: 1,245	Re: Help with exhaust manifolds These are 97-99 vette. The Y2K cars went to a cast iron manifold with a heat shield. After 05 I'm not even sure what they came with. I got these on ebay for $75 years ago and there's a pair on there right now for $89.50 http://www.ebay.com/itm/GM-CHEVY-GEN...f6651e&vxp=mtr I hope that helps. __________________ 56 GMC BUILD THREAD: http://67-72chevytrucks.com/vboard/s...d.php?t=368649 69 long bed Chevy turned 67 gmc jimmy roadster: https://67-72chevytrucks.com/vboard/...d.php?t=851167

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