Headers and Mufflers

OGRES

Legacy Registered User
LIFETIME
City
Suwanee
State
GA
#1
A PO of my Scrambler installed an early Chevy 350 V8 that currently has un-coated Hedman headers and a pair of crappy oval mufflers that hang down past the frame rails (why they were installed with the long width up and down, I will never know). The headers are thoroughly rusted and have some leaks, mainly in the connection between the headers and the collection adapter.

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I want to replace the headers and mufflers but I am not quite sure what would be the best option out there. I like the Hedman Header brand. I can get the same bare steel headers for fairly cheap or I can go with a heavier set with a ceramic coating (like these...headers or these...headers) that might hold up better in the long run. I also want to get some new mufflers that don't hang down past the frame rails. I was looking at some round Flowmaster (Flowmaster) ones, but I really don't have much of a clue as to what kind would be a good option.

For those of you running V8's and dual exhausts, what do you have and why do you like (or dislike) it?
 

walkerhoundvm

Typical Know-it-all
LIFETIME
CJ-8.com Member
City
Cave Creek
State
AZ
#2
I've got Magnaflows on mine, and I like them. Loud when you want, quiet when you don't. I like dual because it's been easier to work on, no routing in the way of drivetrain access, etc. I can take some pictures of my layout if you think it might help.

I got my manifolds (OEM Corvette C6) ceramic coated by JetHot. Don't know if I'd do it again, but I'm happy with them.
 

Randyzzz

Blown Budget
LIFETIME
CJ-8.com Member
SOA Member
City
Redmond
State
OR
#3
Wow, those do hang down!
I think ceramic coated headers are the way to go if you don’t run regular manifolds.
I have run Flowmasters, and I really don’t care for the drone at highway speeds. I hear the 50 series are quieter but I have no personal experience. I also have used the Thrush Welded mufflers and they are loud and have some drone too. Just installed a set of Dynomax stainless mufflers on my build, but it will be a while until I know if I like them. A turbo style muffler generally gives the quietest performance sounding exhaust- I had some Raptor turbos and they weren’t bad.
Unfortunately picking mufflers is like picking seats- you don’t really know if you will like them until they’re purchased and installed.
 

OGRES

Legacy Registered User
LIFETIME
City
Suwanee
State
GA
#4
Thanks for the replies fellas.

What I have now is pretty loud and it rattles a bunch because of the loose connections from the headers to the main pipe.

I have heard good things about the Magnaflows too, so I will check those out as well.
 

mwqpd11

Scrambler Junkie
LIFETIME
CJ-8.com Member
City
Coopersburg
State
PA
#6
Stock manifolds and dual flow masters. Had a cj with side exhaust. Used flow master Hush Power. Quiet deep sound
 

Scott_P

Legacy Registered User
CJ-8.com Member
City
Benzonia
State
MI
#7
Check out Jones Exhaust....summit racing distributes there products. Made in the USA and excellent quality, great prices and tons of sizes/types.
I believe they manufacture for the big names, but also sell under there own brand for much less.

I am running this one: https://www.summitracing.com/parts/jex-mf2298 with a ceramic coated shorty headers. Duals in from headers with a 3" single tail pipe.
 

OGRES

Legacy Registered User
LIFETIME
City
Suwanee
State
GA
#8
Check out Jones Exhaust....summit racing distributes there products. Made in the USA and excellent quality, great prices and tons of sizes/types.
I believe they manufacture for the big names, but also sell under there own brand for much less.

I am running this one: https://www.summitracing.com/parts/jex-mf2298 with a ceramic coated shorty headers. Duals in from headers with a 3" single tail pipe.
Good to know. Thanks!
 

Scott_P

Legacy Registered User
CJ-8.com Member
City
Benzonia
State
MI
#9
And it sounds good... but not too loud in my opinion. Throatier/deeper tone and a little quieter than the flowmaster 3 chamber I was running of the same configuration
 

Yumalee

Basic User
City
Yuma
State
AZ
#10
A little late, but here's my take. I have SBC in my '84 Scrambler. I used M.O.R.E. engine mounts. My muffler guy was really pushing of shorty headers and inside the frame plumbing. He said fender well is a pain. I think he's right. I have fender well on my CJ5. Great for opening them up, but kind of have to plumb for mufflers. Anyway, I used the Hedman headers you are looking at. Fit fine and cleared all frame and mounts.

Problem is getting to the spark plugs are a nightmare. I have to use half my tool box just to get the plugs out. The header covers the plugs in different ways and some need extensions, some not. Some need a socket with a hex on the end and uses of an open enc wrench to reach them. #5 plug is so hidden your can't hardly see it. It is shrouded by three exhaust pipes and you'll burn up 90° cables. I ended up buying one 135° cable just for that plug. The driver's side is the worst, but the pass. side needs the hex end socket and wrench on #6 & 8. If you get the wires figured out, everything else fits nicely. My only other problem is those headers are 1 1/2 " tubes. I have a 383 and would like 1 3/4 inch. Hard to find for inside the rails.

I have Flowmasters on the duel pipes. They lay flat, no problems. I can't see any reason the the vertical mount. I'm know sure which series they are, but my motor drowns them out above City speed. I came to this forum looking for info on other headers options. I might be up to sell mine if I come up with an alternative. They're the coated ones.
 
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