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#1 |
Registered User
Join Date: Nov 2011
Location: USA
Posts: 387
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Are cast iron manifolds that much more quiet than headers?
I dont think that I have ever owned a car with cast iron manifolds before. Will the cast iron manifolds be all that much more quiet than a set of headers if you are running the exact same mufflers for instance a set of flowmaster 40 series?
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#2 |
Registered User
Join Date: Apr 2013
Location: South Westerlo, New York
Posts: 1,325
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Re: Are cast iron manifolds that much more quiet than headers?
In my experience, yes. I don't know it sandersons are quieter than cheaper headers though.
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Thanks, Joe.. 1969 C/10, 348 C.I., 3X2 bbl. V8, 2004r , LWB. |
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#3 |
Senior Member
![]() Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,913
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Re: Are cast iron manifolds that much more quiet than headers?
Yes, especially in the firewall area and under the front - inside the vehicle.
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I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson |
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#4 |
Registered User
Join Date: Jul 2009
Location: Space Coast, Fl.
Posts: 1,050
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Re: Are cast iron manifolds that much more quiet than headers?
I don't find any difference at the exit end of the exhaust system.
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Dad always said, "Son, WISH IN ONE HAND, and ......." -------------------------------------- -------------------------------------- Current toy trucks: '71 GMC 1500 SUPER CUSTOM short/step, orig. dk. blue, 350/700r, ps,pb, A/C '72 Blazer 2wd, ochre & white, 454, tremecTKO 500 5spd. ps, pb, A/C, tilt Last 10yrs of hobby vehicles, had a FEW more in the 50yrs. before these: '66 Plymouth Belvedere City of Miami cop car clone. '70 Nova 406"sb, 13.5-1, solid roller, Brodix, p.glide/t.brake, back halved, 9" Ford, spool 4.88, cage,ladder bar/coilover, 10.5 tire....... SOLD!! '67 C10 short/step side mount spare -- SOLD!! '72 Jimmy 2wd, 350/350, ps, pb, fun driver, lots of bondo & a shiny red paint job..... SOLD!! '69 Nova 350, 4spd, A/C, ps, p.b, ...SOLD!! |
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#5 |
Senior Member
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Location: Godley, TX
Posts: 17,963
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Re: Are cast iron manifolds that much more quiet than headers?
Agree with all - the additional noise (or music, take your pick) from headers really just manifests in the cab, not out the back. The cab noise isn’t really musical though on a long trip.
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#6 | |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,638
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Re: Are cast iron manifolds that much more quiet than headers?
Quote:
![]() To the OP, yeah, like others said, cast manifolds are noticeably quieter from inside the cab.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#7 | |
Senior Member
![]() Join Date: Oct 2009
Location: Godley, TX
Posts: 17,963
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Re: Are cast iron manifolds that much more quiet than headers?
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#8 |
All about them K’s
![]() Join Date: Jun 2014
Location: Land of Entrapment
Posts: 6,379
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Re: Are cast iron manifolds that much more quiet than headers?
Sounds bad ass to me... at 32 I guess I’m still young though....
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Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 315/75/16's ‘87 IROC-Z all original 50K mile survivor TPI 305 IROC Blue ‘10 Camaro 2SS/RS Aqua Blue Metallic #93 -version 2.0 ![]() |
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#9 | |
Senior Member
![]() Join Date: Oct 2009
Location: Godley, TX
Posts: 17,963
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Re: Are cast iron manifolds that much more quiet than headers?
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#10 |
Registered User
Join Date: Jun 2015
Location: Carlos MN
Posts: 2,048
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Re: Are cast iron manifolds that much more quiet than headers?
If you are running 40 series Flow Masters the truck will be a bit loud matter what.
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#11 |
Registered User
Join Date: Nov 2011
Location: USA
Posts: 387
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Re: Are cast iron manifolds that much more quiet than headers?
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#12 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,638
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Re: Are cast iron manifolds that much more quiet than headers?
A bit off topic but while we're talking about noise I gotta add this:
1968, same '65 Corvette, 19 years old, working in Barstow California. Went to a friend's place near Fresno on a weekend and we installed the Hooker headers. Started Saturday, finished Sunday except for welding the reducers to the exhaust pipes. Couldn't find anyone to do it so I drove it back to Barstow with open headers dumping right near my feet. It was about 240 miles, through Bakersfield and across the desert, and I'll never forget that glorious sound!! ![]() If I did that now, I would probably 1) Get a ticket -- or several, and 2) get a throbbing headache.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#13 |
Proprietor of Dale's Corner
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Location: Vacaville , CA
Posts: 16,106
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Re: Are cast iron manifolds that much more quiet than headers?
I love my headers, I really don't notice in the cab a lot. If I open the go fast pedal is when I notice it. The big block sounds great through the flowmasters.....
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"Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man |
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#14 |
Registered User
Join Date: May 2016
Location: Henderson NC
Posts: 975
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Re: Are cast iron manifolds that much more quiet than headers?
I open the back glass so I can hear my pipes, lol.
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#15 |
Special Order
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Location: Mt Airy, MD
Posts: 85,859
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Re: Are cast iron manifolds that much more quiet than headers?
I guess my ears are different. I never noticed headers making my trucks any louder in the cab. I mean louder? Nope, never in one of my trucks. I'm not saying there might not be added low level sound due to the tubes vs cast, but nothing worth noting. Nothing to affect a reason the run headers or not. I had brand new custom dual exhaust put on my '71 Custom Camper before taking it from Maryland to Arizona for a vacation. Descending from the North Rim of Grand Canyon one manifold blew out. We couldn't find a manifold so they put a set of cheap headers on. They had no effect on the sound level in the cab. We were able to enjoy our conversations just the same as before for thousands more miles of hiway driving. What I hear in my trucks is out behind the cab. In that truck I loved the sound of the pipes through the open slider and the two rearward side camper windows I'd leave cranked out a bit. Especially running it out the merge ramp after a stop. But that steady purr at hiway speed was music to my ears
I never know what people mean by loud in the cab. I must be half deaf. I have two videos that show what my truck sounds like at idle and taking off easy, and one on the pedal. I've played them here before. I might be missing this noise and need to have it pointed out to me
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ Last edited by special-K; 03-22-2020 at 08:01 AM. |
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#16 |
Registered User
Join Date: Feb 2018
Location: Fountain Hills, AZ
Posts: 161
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Re: Are cast iron manifolds that much more quiet than headers?
Depends a lot on the motor, of course.
Under hood and in cab noise is generally greater with headers. Out the back is the same. My 2 cents based on numerous trucks owned over the years. |
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#17 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,638
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Re: Are cast iron manifolds that much more quiet than headers?
Something just now came to mind (1968 was a long time ago & my memory ain't what it should be). A good part of the extra noise (a very good part) from headers in my old Corvette came from the solid lifters.
I still appreciate that light, rapid clatter, like mice tap-dancing on the valve covers. ![]()
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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