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#1
03-11-2018, 09:15 AM
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exhaust manifold difference?
I have the correct 64 drivers side exhaust manifold for dual exhaust but I have a passenger side which numbers come out to be a 66 with the heat riser valve. Are the 64 and 66 manifolds the same except for part numbers? Will the 66 bolt up and work?
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#2
03-11-2018, 12:49 PM
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The 64 heat riser “weight” is different from the 65 and newer style.
Below is a NOS 64 RH exhaust manifold (first 4 pics). Last pic is a pair of 65 manifolds. Same bolt pattern on all of them. Chris. Last edited by 60sstuff; 03-11-2018 at 12:55 PM. |
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#3
03-11-2018, 04:25 PM
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Hello Chris. I see your 64 manifold does not have the little anti rattle spring but the 65 does. Did they not use that spring in 64?? I don't know. "Bill"!
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#4
03-11-2018, 05:45 PM
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I'm not too worried about the heat riser, I'm probably going to make sure it stays open. I'm more worried about flow and if it is basically the same if I go with the 64 on one side and 66 on the other.
Thank you for all the help and pictures! |
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#5
03-11-2018, 07:03 PM
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Quote:
I purchased the NOS 64 manifold as shown. I’m sure it had the anti rattle spring at one time. I have an NOS Spring and my MPC shows 63-67 All exc. T/6 #521580. Chris. |
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#6
03-11-2018, 08:44 PM
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As always, Chris, many thanks!!!! "Bill"!
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#7
03-11-2018, 09:17 PM
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Quote:
You're good.
__________________
1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/3.08 2002 WS6 Convertible LS1/4L60E/3.23 1966 VW Type 2 Single Cab Pickup 140hp 2276 1956 VW Type 2 Panel Van 36hp 1200 1957 VW Type 1 Beetle 180hp 2276 |
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#8
03-12-2018, 06:54 AM
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Thank you! Were the down pipes 2 1/2" from the manifolds in 64?
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#9
03-12-2018, 06:33 PM
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I remember 2-1/4" but that was a long time ago with a lot of header swaps after those days.
Tom V.
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#10
03-12-2018, 08:20 PM
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For '64 GTO
Head pipes were 2.25" Mufflers were 2.25" inlet and 2.00" outlet Tailpipes were 2.00" Same exhaust for auto and manual trans '65 was different. |
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