Exhaust woes. A question or two as well. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**68 Stepside** · 10-07-2007, 05:15 PM

Hey all,

Replaced my 2 1/4" glasspack system with a set of thrush turbo 2 1/2" header-mount mufflers earlier in the week. While I like the sound of them, and the reduction in interior noise at speed, they hang under the tranny crossmember. There's one particular railroad crossing in town that they scrape on, I knew they'd be too low.

While I just have the mufflers and that's it right now, my plan was, and still is to do a complete system, to the rear. Is there a company that sells a header-back 2 1/2" complete exhaust for our trucks, minus the mufflers? Or is there a company that sells one at all. I can't seem to find anything but 2 1/4"

Here's a short video clip of the mufflers dragging, I was goofing around with my camera. You can hear them drag about 8.5 seconds into the clip.

http://www.youtube.com/watch?v=8rWSdhYg1Go

corn · 10-07-2007, 05:19 PM

I think you can buy them for headers from summit with or without mufflers.

70GMCer · 10-07-2007, 06:10 PM

All I hear is the music......Maybe my hearing is going bad because of the music....hehe

**68 Stepside** · 10-07-2007, 07:16 PM

Yeah, it's hard to hear because of the music, didn't expect it to scrape, so I had the music playing.

The only front to rear 2 1/2" exhaust I could find thus far is a Dynomax stainless from LMC. But it's really spendy. There's got to be a bolt on 2 1/2" exhaust for our trucks that's not $500.00

piecesparts · 10-07-2007, 08:26 PM

So, let me get this straight--you hung your muffs right off of the headers and now you want an exhaust system to the rear. I don't know of any company that sells a complete exhaust system that will go that far forward. Most work on a short set of pipes to the mufflers coming from the headers and then the tailpipes run on back from the mufflers. (that way the mufflers are behind the cab and they clear those stupid railroad tracks) I found a good muffler shop in my area that I could make friends with and we built my systems for my trucks.

**68 Stepside** · 10-07-2007, 08:27 PM

Perhaps I didn't make myself clear (it's happened before). I'd like to take these mufflers and modify them (cut the header flanges off) and adapt them to a full length 2 1/2" system. Sorry about that. There's one muffler shop in my area that might do me right, going to call them next week.

Wow, my 5,000th post!!

72BLUZ · 10-07-2007, 10:54 PM

The Right Muffler Man Can Get Your Exhaust Behind The Frame, And He Can Cut Holes In The Frame Cross Member Using A Plasma Cutter. Thats How Mine Is Done. The Only Thing Seen On Mine Is The Tail Pipes

dastuck · 10-08-2007, 09:06 AM

68 stepside it sounds like your running the same setup i had in my 72 when i was in high school. I was running thrush mufflers bolted straight to my headers as my exhaust. You must not be running stock height on the truck or have some crazy railroad crossings in your area if your dragging. I can see why you want to redo the exhaust. You could clearly see my exhaust "system" on my truck with the thrush hanging down below the frame. I did like the sound but not the looks. I would say find a local shop and tell them what your wanting to do. Im sure if you find the right one he will be able to help you out.

10-07-2007, 05:15 PM	#1
68 Stepside huh? Join Date: May 2000 Location: Washington, Illinois Posts: 5,692	Exhaust woes. A question or two as well. Hey all, Replaced my 2 1/4" glasspack system with a set of thrush turbo 2 1/2" header-mount mufflers earlier in the week. While I like the sound of them, and the reduction in interior noise at speed, they hang under the tranny crossmember. There's one particular railroad crossing in town that they scrape on, I knew they'd be too low. While I just have the mufflers and that's it right now, my plan was, and still is to do a complete system, to the rear. Is there a company that sells a header-back 2 1/2" complete exhaust for our trucks, minus the mufflers? Or is there a company that sells one at all. I can't seem to find anything but 2 1/4" Here's a short video clip of the mufflers dragging, I was goofing around with my camera. You can hear them drag about 8.5 seconds into the clip. http://www.youtube.com/watch?v=8rWSdhYg1Go __________________ Someday when I'm lonely, Wishing you weren't so far away, Then I will remember Things we said today. RIP El Jay Last edited by 68 Stepside; 10-07-2007 at 05:16 PM.

10-07-2007, 05:19 PM	#2
corn Registered User Join Date: Dec 2003 Location: here Posts: 5,789	Re: Exhaust woes. A question or two as well. I think you can buy them for headers from summit with or without mufflers.

10-07-2007, 06:10 PM	#3
70GMCer Senior Member Join Date: Apr 2005 Location: Joppa, Maryland Posts: 4,408	Re: Exhaust woes. A question or two as well. All I hear is the music......Maybe my hearing is going bad because of the music....hehe __________________ 1997 GMC Sierra Ext 1965 Mustang

10-07-2007, 07:16 PM	#4
68 Stepside huh? Join Date: May 2000 Location: Washington, Illinois Posts: 5,692	Re: Exhaust woes. A question or two as well. Yeah, it's hard to hear because of the music, didn't expect it to scrape, so I had the music playing. The only front to rear 2 1/2" exhaust I could find thus far is a Dynomax stainless from LMC. But it's really spendy. There's got to be a bolt on 2 1/2" exhaust for our trucks that's not $500.00 __________________ Someday when I'm lonely, Wishing you weren't so far away, Then I will remember Things we said today. RIP El Jay Last edited by 68 Stepside; 10-07-2007 at 07:17 PM.

10-07-2007, 08:26 PM	#5
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: Exhaust woes. A question or two as well. So, let me get this straight--you hung your muffs right off of the headers and now you want an exhaust system to the rear. I don't know of any company that sells a complete exhaust system that will go that far forward. Most work on a short set of pipes to the mufflers coming from the headers and then the tailpipes run on back from the mufflers. (that way the mufflers are behind the cab and they clear those stupid railroad tracks) I found a good muffler shop in my area that I could make friends with and we built my systems for my trucks.

10-07-2007, 08:27 PM	#6
68 Stepside huh? Join Date: May 2000 Location: Washington, Illinois Posts: 5,692	Re: Exhaust woes. A question or two as well. Perhaps I didn't make myself clear (it's happened before). I'd like to take these mufflers and modify them (cut the header flanges off) and adapt them to a full length 2 1/2" system. Sorry about that. There's one muffler shop in my area that might do me right, going to call them next week. Wow, my 5,000th post!! __________________ Someday when I'm lonely, Wishing you weren't so far away, Then I will remember Things we said today. RIP El Jay Last edited by 68 Stepside; 10-07-2007 at 08:28 PM.

10-07-2007, 10:54 PM	#7
72BLUZ Registered User Join Date: Nov 2006 Location: lafayette, ga. Posts: 832	Re: Exhaust woes. A question or two as well. The Right Muffler Man Can Get Your Exhaust Behind The Frame, And He Can Cut Holes In The Frame Cross Member Using A Plasma Cutter. Thats How Mine Is Done. The Only Thing Seen On Mine Is The Tail Pipes __________________ Freedom is never more than one generation away from extinction. We didn't pass it to our children in the bloodstream. It must be fought for, protected, and handed on for them to do the same.... Ronald Reagan

10-08-2007, 09:06 AM	#8
dastuck Registered User Join Date: Sep 2007 Location: melvern, ks Posts: 71	Re: Exhaust woes. A question or two as well. 68 stepside it sounds like your running the same setup i had in my 72 when i was in high school. I was running thrush mufflers bolted straight to my headers as my exhaust. You must not be running stock height on the truck or have some crazy railroad crossings in your area if your dragging. I can see why you want to redo the exhaust. You could clearly see my exhaust "system" on my truck with the thrush hanging down below the frame. I did like the sound but not the looks. I would say find a local shop and tell them what your wanting to do. Im sure if you find the right one he will be able to help you out.



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