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10-20-2012, 09:07 PM | #1 |
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Location: NLR, AR
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Exhaust manifold questions.
On this 72 jimmy 4x4. A previous owner installed a set of headers. They are rusted thru, as well the front axle hits one of the pipes and has heavily crushed it. I have also had nothing but problems with headers over the years and am not a fan of them.
I'm wondering what is the best flowing stock exhaust manifolds I can get and put on this? I see the 73-87 is more of a tube style. Do they flow better then the m style of the 67-72's? What about even newer, like mid 90's?
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2008 Sierra k3500 LMM 1994 s10 blazer 4x4 1991 Camaro Vert Rusted in Half RIP 1972 Jimmy 4x4 L05,4L60E,np205http://67-72chevytrucks.com/vboard/s...d.php?t=546364 1967 C10 L6/3tree(dads truck) |
10-20-2012, 11:31 PM | #2 |
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Re: Exhaust manifold questions.
New ones.
Search google images for rams horn manifolds like these. Or look on ebay. http://www.jegs.com/i/Wysco/938/MA035RAW/10002/-1 |
10-21-2012, 09:20 AM | #3 |
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Re: Exhaust manifold questions.
Is that for a pair, or one side?
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10-21-2012, 10:07 AM | #4 | ||
"I ain't nobody, dork."
Join Date: Sep 2007
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Re: Exhaust manifold questions.
As far as manifolds go... the stock ramhors are pretty good flowing.
A lot of cats think headers are a pain in the rear... If they are installed to the correct application, the correct style gaskets are used, and the fasteners are not over tightened, they will seal up and last for a long time. But that's just me... I wikes headers. Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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10-21-2012, 10:16 AM | #5 |
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Re: Exhaust manifold questions.
that should be for a pair, Speedway, for instance, has them for $114/pair:
http://www.speedwaymotors.com/Dorman...air,58966.html right now they even have a "garage sale" (previously installed) passenger side one for $40. the difference in the Jegs and the Speedway versions is the brackets, the jegs don't have them. you would need to determine if you need them, or if they would be in the way. you also need to look and see if you can run a straight down exit like that. I have these 2 1/2" "corvette" style on my '66 2WD pickup but your later model 4WD might not allow them
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Larry |
10-21-2012, 11:17 AM | #6 |
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Re: Exhaust manifold questions.
Ive had proper to the ride headers, and had problems, on several different rides.
I did some searching and found the dormans being posted in same thread as the wyscos. So I went out and looked. The tab would be find on pass side, but not drivers. Strait down will work easily on drivers. Pass side, I would have to 90deg bend it soon as it comes out, but do have space do do that. |
10-21-2012, 12:42 PM | #7 |
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Re: Exhaust manifold questions.
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10-21-2012, 07:06 PM | #8 | |
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Re: Exhaust manifold questions.
Quote:
Alex. Getting old and lazy. |
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10-21-2012, 07:36 PM | #9 | |
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Re: Exhaust manifold questions.
Quote:
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Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim |
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10-21-2012, 10:31 PM | #10 |
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Re: Exhaust manifold questions.
Thanks for info on the tabs. Was wondering about that.
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10-22-2012, 08:17 AM | #11 |
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Re: Exhaust manifold questions.
Youre welcome, bought my 2 1/2" from dorman....
Use the OEM locking tabs for the mounting bolts, retorque after a couple heat cycles, should be good for years of no leak miles Gasket? Or not, that is another debate..... Use extra large brass nuts on the three studs with hi temp anti seize, i think its the one with nickle
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Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim |
10-22-2012, 09:02 AM | #12 | |
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Re: Exhaust manifold questions.
Quote:
I had to cut the tab off of one of mine like jaros44sr mentions, it was pretty easy.
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Larry Last edited by fleetsidelarry; 10-22-2012 at 09:03 AM. Reason: spelling |
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10-28-2012, 06:13 PM | #13 |
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Re: Exhaust manifold questions.
What size/length bolts will I need with these dorman vette manifolds? About to place an order for other things and am going to include these.
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10-28-2012, 10:03 PM | #14 |
Fabricate till you "puke"
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Re: Exhaust manifold questions.
Manifold to head bolts ,should be 2 1/4 " on that sb Chev.....try to find that one in the hardware store! Chase /trim the 2 1/2, or try the dealer (your butt might hurt )! crazyL
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
10-28-2012, 10:39 PM | #15 |
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Re: Exhaust manifold questions.
Thanks on the length.
Ive learned to get the special exhaust bolts. Normal bolts seem to stretch with the heat cycles, so no hardware stores will work on this part. |
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