Replacing M1008 exhaust system

[86M10086.2L]

So after half the exhaust system fell off my truck. I suppose I now have to replace it. I want to run a dual system like the factory one that came with the truck. I talked to a few muffler shops and they all wanted $600 or more, no beuno. LMC has a replacement sytem for around $225, ok but uses crappy walker style mufflers. Restrictive and very quiet. Summit has some do it yourself kits ( mandrel bent! ) for the truck and I can choose what mufflers I want for about $400. Thats most likely what I'm gonna do. Problem is there are no kits listed for the 6.2L diesel. What I need to know is the exit locations of the manifolds on the 6.2. Are they the same as any of the GM small or big block engines? IE can a system from a small or big block truck be used on the 6.2? I dont want to hack/modify if i dont have to. I dont want a single pipe kit. I've already had to settle with 2 1/4" pipes. 2 1/2" kits are stupidly expensive. Thoughts? I'd love some info

 

[hogtruck]

Try www.rockauto.com for the pipes form exhaust manifold to muffler, then 2 inexpensive aftermarket mufflers.

 

[86M10086.2L]

yeah, I looked into that. costs about the same as just buying a kit.

 

[GM72K10]

I've redone two of these dual exhaust systems, one 6.2L one a gas 350, both the same stock exhaust. Napa has the pipes and mufflers but it isn't cheap even with a discount.

 

[86M10086.2L]

so you used the same system on a gas and a diesel truck? everyone is telling me the manifolds exit differently on a diesel and you cant use a gas system.

 

[bearboley]

Strait down at the rear with a three bolt flange. I don't think there the same as a small or a big block there kinda in between. I would Take my old one off and have a muffler shop make me some headpipes to drop down for the duals and start back from there. If you wanted all new If I were doing it on the cheap I would cut the y pipe and start there because don't the pipes have to run down the same side of truck. Or you could go with a new y pipe and a 1 in and 2 out flowmaster they sound good on the 6.2L

 

[86M10086.2L]

Pretty much all the piping on my truck is shot. I can modify a existing system if I need to. Just hate to spend the money on something new I know isnt going to fit. My plan is for 50 series flowmasters on the truck. I've heard 40's and delta 40's can be rather obnoxious on long trips

 

[bearboley]

Yea these muffler shops have crazy prices. My buddy has the 50 series on his 454 3/4 chevy with pipes out the back and I thinks it quiet you can only hear the motor under hard acceleration. I think a factory y pipe from napa and a 50 series 1 in the center with 2 out and a couple factory tailpipes out behind the wheels would be what I would do. I run a 6.2 with a 6.5 turbo strait piped 3" and its not loud at all

 

[jdeoliveira74]

I sure dont miss the ny prices... I just replace my entire exhaust from front to back for 225.00

 

[taquito971]

The manifold positions are the same as on a 350 SBC. I know for sure because I swapped the 350 out of my truck and put in a 6.2 with no mods to the exhaust.

 

[AJMBLAZER]

The manifold positions are the same as on a 350 SBC. I know for sure because I swapped the 350 out of my truck and put in a 6.2 with no mods to the exhaust.

What he said. Just buy a manifold back system for a 80's K30 longbed with a SBC and it'll bolt right too it.

 

[GM72K10]

so you used the same system on a gas and a diesel truck? everyone is telling me the manifolds exit differently on a diesel and you cant use a gas system.

Put a dual exhaust system from a M1010 on my K30 gas dually, fit exactly.
the fact that they were both 4wd is why they were the same.

 

[86M10086.2L]

Very cool, this news just made me very happy. Gonna Order up a hooker exhaust kit, and some stainless steel 50 series flowmaster mufflers (cuz they're only 8 bucks more than the steel ones).