Exhaust manifold issue needs some help!!!!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**blazercrazy70** · 03-20-2015, 05:27 PM

I have called a half a dozen junkyards for trailblazer manifolds no problem getting them but you can't get the flange or down pipe with o2 bung because they are removed before they get them. Need some help to locate these if anybody has any ideas. I thought getting the manifold was the hard part not the issue here I'm not a header fan but it may be the way I go if this keeps up

BR3W CITY · 03-20-2015, 05:53 PM

Couple options;

Check with a Midas/Monroe and see if they have them. Their mechanics are paid for efficiency, and sometimes keep things like flanges around for their own use on repairs. They cut 100's of them off each month. These will usually be pretty rusty tho.
OR
Buy the flanges alone on ebay, and add your own downpipe and bung. This is nice because you can change the dp length as needed, and orient the bung so it doesn't interfere with other clearances.
OR
Have them lasercut. With technology today, its actually pretty reasonable to have a local metalshop chop a few out for you. (not cheap per se, but a great option to upgrade to extra thick flanges or stainless!)

cableguy0 · 03-20-2015, 07:35 PM

Order set of flanges. They are thicker than an exhaust shop can get. Take them with you when you have the exhaust made. The exhaust shop should have o2 bungs on the shelf to weld in. Its no big deal. Even if you just take the flanges to an exhaust shop without the truck they should be able to make your down pipes with the o2 bungs for you so long as it isn't anything crazy as far as bends required in the pipe. It can be difficult to bend pipe without having the vehicle there for a template. If you were closer to me I could take care of it for you easily at work.

**blazercrazy70** · 03-20-2015, 08:32 PM

Thanks alot guys appreciate the help. Wish I was closer to PA I would be there in a heart beat.

**blazercrazy70** · 03-20-2015, 08:52 PM

What would you query for the flanges on ebay

cableguy0 · 03-20-2015, 11:22 PM

There are more but this was the first I came up with. http://www.speedwaymotors.com/GM-53-...nch,47336.html

BR3W CITY · 03-21-2015, 02:42 AM

Where in IL are you? Were you planning on having a shop do an exhaust for you, or building one yourself?

**blazercrazy70** · 03-22-2015, 01:06 AM

I have a friend that has a shop they are going to do the exhaust. I think I have found what I need. I have a set of flanges that came with my motor and the stock manifolds I believe they are the same flanges that bolt to the tbss manifolds

**truckdude239** · 03-22-2015, 10:28 PM

stock truck flanges fit the trailblazzer ss manifolds its what i used

03-20-2015, 05:27 PM	#1
blazercrazy70 Senior Member Join Date: Sep 2006 Location: illinois Posts: 516	Exhaust manifold issue needs some help!!!!! I have called a half a dozen junkyards for trailblazer manifolds no problem getting them but you can't get the flange or down pipe with o2 bung because they are removed before they get them. Need some help to locate these if anybody has any ideas. I thought getting the manifold was the hard part not the issue here I'm not a header fan but it may be the way I go if this keeps up

03-20-2015, 05:53 PM	#2
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: Exhaust manifold issue needs some help!!!!! Couple options; Check with a Midas/Monroe and see if they have them. Their mechanics are paid for efficiency, and sometimes keep things like flanges around for their own use on repairs. They cut 100's of them off each month. These will usually be pretty rusty tho. OR Buy the flanges alone on ebay, and add your own downpipe and bung. This is nice because you can change the dp length as needed, and orient the bung so it doesn't interfere with other clearances. OR Have them lasercut. With technology today, its actually pretty reasonable to have a local metalshop chop a few out for you. (not cheap per se, but a great option to upgrade to extra thick flanges or stainless!) __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

03-20-2015, 07:35 PM	#3
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,948	Re: Exhaust manifold issue needs some help!!!!! Order set of flanges. They are thicker than an exhaust shop can get. Take them with you when you have the exhaust made. The exhaust shop should have o2 bungs on the shelf to weld in. Its no big deal. Even if you just take the flanges to an exhaust shop without the truck they should be able to make your down pipes with the o2 bungs for you so long as it isn't anything crazy as far as bends required in the pipe. It can be difficult to bend pipe without having the vehicle there for a template. If you were closer to me I could take care of it for you easily at work. __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

03-20-2015, 08:32 PM	#4
blazercrazy70 Senior Member Join Date: Sep 2006 Location: illinois Posts: 516	Re: Exhaust manifold issue needs some help!!!!! Thanks alot guys appreciate the help. Wish I was closer to PA I would be there in a heart beat.

03-20-2015, 08:52 PM	#5
blazercrazy70 Senior Member Join Date: Sep 2006 Location: illinois Posts: 516	Re: Exhaust manifold issue needs some help!!!!! What would you query for the flanges on ebay

03-20-2015, 11:22 PM	#6
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,948	Re: Exhaust manifold issue needs some help!!!!! There are more but this was the first I came up with. http://www.speedwaymotors.com/GM-53-...nch,47336.html __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

03-21-2015, 02:42 AM	#7
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: Exhaust manifold issue needs some help!!!!! Where in IL are you? Were you planning on having a shop do an exhaust for you, or building one yourself? __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

03-22-2015, 01:06 AM	#8
blazercrazy70 Senior Member Join Date: Sep 2006 Location: illinois Posts: 516	Re: Exhaust manifold issue needs some help!!!!! I have a friend that has a shop they are going to do the exhaust. I think I have found what I need. I have a set of flanges that came with my motor and the stock manifolds I believe they are the same flanges that bolt to the tbss manifolds

03-22-2015, 10:28 PM	#9
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,238	Re: Exhaust manifold issue needs some help!!!!! stock truck flanges fit the trailblazzer ss manifolds its what i used __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube



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