84 K10 full exhaust replacement

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Grit dog

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May 18, 2020
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Location
Auburn, Washington
First Name
Todd
Truck Year
1986, 1977
Truck Model
K20, C10
Engine Size
454, 350
I drove 850 miles RT across 4-5 states to pick up a seat yesterday. It was an 18hr non-stop turn and burn. Seller said I was crazy. I said yeah man, but that's a really nice seat!

Recently ordered:
4 Rough Country leafs with 2in lift, shocks, steering dampener.
Edelbrock 2701 intake and 600cfm carb kit
Valve covers
Double roller timing set
Water pump
Oil pan gasket
33in x 10.50in KO2s white letters out...80s style
New bumpers and grille off LMC
Lots of stuff rolling in

I want everything completed in about a month and will figure out paying for it later.
Cancel the rough country order and get some softer springs so that you're not caller #69 in 2 weeks asking us if theres a way to make those lumber wagon springs softer.
 

83Stepper

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Mar 9, 2025
Posts
80
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152
Location
Massachusetts
First Name
Chad
Truck Year
1983
Truck Model
C10
Engine Size
350
Ran a true dual setup on my 85 K5 Blazer that had the Flowtech headers, Dynomax 89007 2.25" pipe kit and a set of Dynomax Super Turbo's. Loved the sound of the super turbos at idle and wot. Very mild sound at idle and sounded great with some serious throttle on it. Headers can be a mother getting them into position. They are a tight fit getting them stuffed up from one side and down from the other. Keep us posted on how it's going!
 

DRW65

Junior Member
Joined
Mar 20, 2023
Posts
12
Reaction score
36
Location
75707
First Name
Dan
Truck Year
1986
Truck Model
K1500
Engine Size
350
On my 86 K1500 I used the Hooker cast iron manifolds and Dynomax turbo mufflers, exhaust is all 2.5", no H or X pipe. No leaks, clears everything and all stock A/C and P/S bracketry bolts up with no issues. I did have to get 12 point exhaust manifold bolts, could not get a socket over standard 6 point bolt on #6 exhaust port. Nice mellow sound that does not get on your nerves.
 

MikeB

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Joined
Apr 4, 2014
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1,806
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1,060
Location
North Texas -- California escapee
First Name
Mike
Truck Year
1969
Truck Model
C10
Engine Size
355
Headers don't fit? What a shocker!

Seriously, stock manifolds should work fine for your stated goals. Or if 2.5" aftermarket ram's horns clear your motor mounts, they would work very well.

Here are some 1997 5.7L manifolds on my 82 C10's mild 350 (RamJet roller cam and Vortec heads). Can't remember where I got them, but lots of vendors sell them. I see where Rock Auto has some on close-out. https://www.rockauto.com/en/catalog...1555,exhaust+&+emission,exhaust+manifold,5860

I eventually installed full length headers, but it was a lot of hassle for no difference that my butt dyno could feel.

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